Read of the KaBoom...UW ammo see video also
https://www.thetruthaboutguns.com/2017/01/jeremy-s/rip-glock-20-kaboom/ (https://www.thetruthaboutguns.com/2017/01/jeremy-s/rip-glock-20-kaboom/)
It was Lehigh's fault (mostly), and partially Underwood's fault. Live and learn. Good thing the guy wasn't hurt.
QuoteSpecifically, the projectile diameter was undersized. Even though the case was properly crimped, the bullet was easily pressed down into the casing (bullet setback) when the round fed into the chamber and this caused a sufficient spike in pressure to do the damage seen above.
Almost always a Glock. In the shot of the brass in the chamber I didn't even see primer flattening. Hopefully more details come out. Makes me want to bust my gloves out when shooting the 10's.
Wow! As the article suggested, fortunate for the shooter, the Glock 20 absorbed most of the 'kaboom's blast'.
FWIW, since I have chosen not to reload, I try to buy the best factory ammo I'm able to. Keith from Underwood, who has been an upfront guy for years, stepped to the plate and there's a lot to be said about him and the company.
I had an 'issue' last year with an undercharged round and when this occurred, I stopped shooting the Underwood 10mm 165gr Gold Dot JHP, contacted Keith and they took back what I had and replaced it with similar ammo.
Like many others, we rely on excellent ammo for our own, our family's protection and self defense, whether it be in the city or in the back country. I hope that Underwood further tightens up their 'quality control', so there's absolutely no issue with their ammo.
More and more I'm using my Glock 20SF as my primary home defense pistol, of course, with other firearms as backup. I like the 10mm round for its versatility and 'results'. Like many others, we always want our pistols to go bang when we pull the trigger with no problems or reservation what-so-ever.
Good to see that the shooter is OK.
Quote from: Intercooler on January 05 2017 04:10:46 AM MST
In the shot of the brass in the chamber I didn't even see primer flattening.
That shot is not with the brass from the incident. That is an unfired round. The author is just showing that the barrel seems undamaged from the incident.
I would love to see the brass, but given that he was shooting in a snow covered area, I would guess it was not recovered.
Wow... lucky he has fingers still.
I do reload, and the one thing I do when working up loads near the top end is to wear my mechanic gloves... people would ask why, a I guess this video is a good answer.
( I also do the bench press ( measure then push round against bench and measure again ) with new rounds to see if any setback occurs )
The nose shape is such that it could easily get hung up or snag during feeding, thus leading to setback issues.
These also have friction reducing bands instead of full length diameters...
Underwood 115gr Lehigh Defense Xtreme (supplied by Chucky 2 11/20/16) Length 0.6270"/Dia. 0.3995"
http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-(100-solid-copper)/msg62479/#msg62479 (http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-(100-solid-copper)/msg62479/#msg62479)
(https://s20.postimg.cc/vmcf6tszh/IMG_0090_zpsgzibkdn4.jpg)
Another done December 9th 2015 also Length 0.6270"/Dia. 0.3995": 115gr XP
http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-12092015/msg51673/#msg51673 (http://10mm-firearms.com/factory-10mm-ammo-pull-downs/underwood-115gr-lehigh-defense-xtreme-penetrator-12092015/msg51673/#msg51673)
Both of these were less than the 0.4000" for normal diameters...while 0.0005" is not that much less,a loss fit in the casing could also contribute to the situation.
Reason why all my 10s are steel warriors. And thats not the 1st Glock I seen or heard of doing that !! And what I don't get is there is soooo much bad talk on here about the Colt Delta Elite not being able to take hot loads , crack frames, not a full supported barrel etc etc.
Well maybe there was a few cracked frames with the Delta but that was in the 80s !!! and just how many were there ?? 100s or 1000s anyone know? All I know is that I haven't seen or heard of the any of the newer Delta Elites having any problems like that.
Just glad he wasn't hurt and had good sense to have Shooting Glasses on.
Quote from: 14 GT-500 on January 05 2017 09:31:30 AM MST
Reason why all my 10s are steel warriors. And thats not the 1st Glock I seen or heard of doing that !! And what I don't get is there is soooo much bad talk on here about the Colt Delta Elite not being able to take hot loads , crack frames, not a full supported barrel etc etc.
Well maybe there was a few cracked frames with the Delta but that was in the 80s !!! and just how many were there ?? 100s or 1000s anyone know? All I know is that I haven't seen or heard of the any of the newer Delta Elites having any problems like that.
Just glad he wasn't hurt and had good sense to have Shooting Glasses on.
Maybe there are more Glock Kabooms because there are more Glocks out there.
http://www.thefirearmblog.com/blog/2016/05/26/exploded-10mm-nighthawk-1911/
Quote
Exploded 10mm Nighthawk 1911
(http://www.thefirearmblog.com/blog/wp-content/uploads/2016/05/IMG_2305.jpg)
Could very well be. But I still like an all Steel Gun when shooting hot 10s
That was not a Glock barrel the gun KB'd with.
You can't blame Glock for that one.
Quote from: 4949shooter on January 05 2017 05:08:36 PM MST
That was not a Glock barrel the gun KB'd with.
You can't blame Glock for that one.
Underwood and Lehigh are to blame.
.
Underwood stepped up. That is HUGE in my book.
Are there any pictures of the casing?
The whole thing is a little too familiar to me. The carbon imprints on the hand where ever there was a way for the gasses to escape. Look on his trigger finger where the trigger safety sets. Mine did the same thing. I had perfect square mag release scorch marks where the mag release sets in the hand.
The other thing he mentioned was the sting. It felt a lot like getting stung by a baseball bat.
Its clear his was worse than mine. My mag wasn't split, the frame was cracked in a few places, but not splintered. My ejector went to places unknown.
Sounds like the same cause. Bullet setback due to insufficient tension on the crimp.
Hope that's the only gun I ever blow up. Its not fun..
Greg
When my HiPoint 4095 Carbine blew my hands stung as well. I only imagine a full power 10mm round!
I am not a Glock guy. I don't own any by my choice. It's just about ergos because they make a fine gun.
I don't get the Glock remarks. It seems, to me, that the Glock did exactly what it was supposed to do to protect the shooter from harm. IMO, I am extremely impressed at how well the Glock handled the failure. The failure was all about the ammo. I may need to rethink owning a Glock because of what I saw here.
People think this is Glock's fault???
Reading. It's fundamental. Wow.
We 90% of the time see this happen in the Glock platform. This is a Glock again and that's what was said.
Take my word for it. Different gun platforms have different maximum pressure limits. If a gun is known for "glock smiles" that is one step toward a kaboom. Everyone wants to defend their pistol, but everyone should go into this with their eyes wide open.
I will say that the Tanfoglio platform is strong. It shows over pressure by loosing the primer. Glocks show it by shearing brass in the form of smiles, and that's not a better or more safe way to handle pressure. I load 10mm to be safe in the Glock. That way its safe in everything I shoot. If I loaded for what the Witness could handle, I'd suffer another kaboom if it ended up in the Glock.
They are different. Just keep that in mind. Load for your weapon and you should be fine.
Greg
Quote from: Intercooler on January 06 2017 03:19:54 AM MST
We 90% of the time see this happen in the Glock platform. This is a Glock again and that's what was said.
Not sure about 90% - but OK, makes some level of sense because the so many of the 10's in use are Glock. Frankly other than myself, I've never in all my years of shooting seen anyone else at the range shooting a 10mm that wasn't a Glock. This case had nothing to do with Glock, and in particular the Glock chamber since it was a LW barrel, AND the ammo manufacturer claimed responsibility, saying this is the fault of Glock is ridiculous.
So a guy puts a an aftermarket barrel in a Glock pistol, blows it up with admittedly flawed ammo from the manufacturer, and you guys want to blame Glock again.
I am calling BULLSHIT on this one.
It's not blaming. Stating the facts of the obvious that what is pictured, written about and had this kaboom was the Glock platform again. I just take note of the platform regardless of what the configuration. I wouldn't be the one to say one way or the other if this barrel (thought to be an upgrade) had any negative effects versus the stock barrel. Different shooters even handle the magazines differently. Maybe he taps stuff to the back or does something weird in his chambering that helps these situations. That was a pretty vague answer from Underwood about what they saw as well.
Lets state it another way.
There are 5 times as many Glock 10mm's on gun ranges today as all other 10mm brands combined. And we see Kabooms in Glock at 2X the rate of any other gun in 10mm. That means the Glock is 2.5 time LESS likely to see a Kaboom than another brand.
Now, I pulled those numbers outta the air, mainly because I don't have time to go track down the real market share. But I think we can all agree that the Glock 20 is the most prolific 10mm platform, by a wide margin. And it is the most prolific handgun platform by a wide margin. Based on a poll linked here Glock was 3X more popular than the next closest gun, and was as popular as all others in the poll combined (Glock 363 vs All Others 369).
If I am out testing ammo, am I gonna grab my $2000 Wilson, my $3000 Nighhawk/Kase Reeder/Ed Brown, or my $550 Glock that I can replace in an hour at any LGS?
If I hear a Kaboom occured, it is gonna be in a Glock, not because of smiles, or other issues, but because Glocks eat far and away more ammo than any other gun brand, especially in layman testing.
I never said that It was a Glock issue, I said that this is one of the reasons why I like an all steel gun when I am shooting hot 10mm. If you want to shoot hot 10s in a Glock thats fine, but I like a little more steel in my guns wheather its a Colt a Kimber, Dan Wesson ,Sig 220 etc etc hopefully thats ok with some of the folks here.
SQLbullet, I have to agree about those who got into the 10mm found Glock as an entry level piece out numbers other makes.
There are so many things that can learned from this situation.
This is not the first time a UW loading caused a KaBoom, 10mm was not the only cartridge either, one of the 357Sig pull-downs was a result of study and documentation aftera Kaboom.
People seeking high performance ammo like UW, have to realize their equipment needs to be able to handle the potential. In this incident there was an anomaly that is suspected...bullet being slightly smaller in diameter. This was documented in a pull-downs also. The bullet design with its cross pointed design could easily snag or catch during cycling event, given the projectile's orientation as it tries to chamber. It is likely the bullet hit the top of the tighter LWD barrel chamber as it entered, thus causing a setback of the smaller diameter bullet. (would this have happened in the factory barrel as well? Maybe) As the projectile was moved deeper into the casing, this allowed itself to chamber. If this happened in any firearm regardless of caliber it too would likely suffer the same fate. It's easy to point fingers at things, this could have easily happened in your firearm or my firearm.
My advice a question to each and everyone, is do you check your ammo to see if bullets are loose? seated at different depths? damaged cases?
Another thing I'll add is recoil assembly systems. I have seen some of the captured systems be so loose they will drop out with there own weight. To me this is a disaster waiting to happen. There isn't enough spring pressure applied to hold the slide in battery. When the cartridge is fired and the casing slams against the breech as the projectile pushes the barrel forward, it can yield less case support if it overcomes the spring pressure before pressure is subsided enough and the bullet leaves the barrel.
First Post for me. Been lurking here for a long time, and appreciate the breadth of knowledge.
Thought this was interesting, as I have a Glock 20 and am now going to check the ammo stash to see if I have any of this ammo.
https://www.youtube.com/watch?v=1dapVWOqMNE&t=13s
Lettusbee67, sorry to steal your first topic, but it was the same incident as this thread.
No problem at all. I should have searched more dilligently.
Thank you
Quote from: Geeman on January 06 2017 04:14:26 AM MST
Take my word for it. Different gun platforms have different maximum pressure limits. If a gun is known for "glock smiles" that is one step toward a kaboom. Everyone wants to defend their pistol, but everyone should go into this with their eyes wide open.
All guns should be able to handle the maximum pressure limits set be either/both SAAMI or/and CIP for the specific cartridge. The Glock 20 was designed specifically for the 10mm: The G21 45ACP was an after though. The 1911 platform was the opposite.
It the brass has a smile, it is over pressure. That is the ammo makers fault, and not the gun makers fault.
Quote from: Geeman on January 06 2017 04:14:26 AM MST
I will say that the Tanfoglio platform is strong. It shows over pressure by loosing the primer. Glocks show it by shearing brass in the form of smiles, and that's not a better or more safe way to handle pressure. I load 10mm to be safe in the Glock. That way its safe in everything I shoot. If I loaded for what the Witness could handle, I'd suffer another kaboom if it ended up in the Glock.
They are different. Just keep that in mind. Load for your weapon and you should be fine.
Greg
It might be better to have the brass shear and vent gasses before the pressure gets too high.
.
Good words Shadow, Geeman and my_old_glock.
Glocks are built handle SAAMI standard ammo. My Glock 20 and 29 are both stock and run everything I throw at them just fine.
My Wtiness guns are capable of handling much more pressure, but that doesn't mean it is a good idea to run a steady diet of such ammo.
Underwood fills a place in the market. I appreciate their product and their work. But I take their statements that their ammo is within SAAMI spec with a grain of salt. When you mass produce ammo that close to the line, you are going to have a "flyer" now and then.
I'm reaching over to knock on some wood but... I have shot everything everyone else has, typically more of it and some stuff others haven't. I have yet to blow up a gun :o Have I been extremely lucky or got through a bad one then somehow?
IC, you were lucky enough to find those setback rounds that were in the PPU brass, beforehand. Sort of the same situation could have happened to you if you had not! :o
Quote from: my_old_glock on January 06 2017 11:04:40 AM MST
It might be better to have the brass shear and vent gasses before the pressure gets too high.
I think this is true. Glocks spit the magazine out, soot things up a bunch, crack out the poly frame, but generally the person shooting it walk away mainly unharmed.
If a witness blew up, I'd guess the barrel would split and take a hand or two with it.
I haven't heard of a witness blowing up, but if one did, I'd guess it would be nasty.
Greg
Someone wanted to see a pic of the brass. This was mine.
(https://photos.smugmug.com/Working-Spaniels/Post/i-VHStkjH/0/XL/DSC_4576-XL.jpg)
(https://photos.smugmug.com/Working-Spaniels/Post/i-gDcjr7X/0/XL/DSC_4575-XL.jpg)
(https://photos.smugmug.com/Working-Spaniels/Post/i-snD39Mz/0/XL/DSC_4580-XL.jpg)
(https://photos.smugmug.com/Working-Spaniels/Post/i-Nqck23B/0/XL/DSC_4588-XL.jpg)
Greg
Something happened on a Hunter once here and I think it didn't do anything other than pop the magazine out. Let me see if I can find it.
I had a KaBoom with a Ruger LCP 380, I have to take responsibility for that one. It was a culmination of factors,load was too hot for a bullet that was too heavy in a brass that was substandard...
Having a 128 grain cast hollow point bullet register velocity 1037 fps & 1038 fps (casing blowout) for this piece as a tad too much...The guts of the magazine blew out, leaving the steel body inside was probably a good thing. Yes it stung like hell, sooted my hand and fingers as there isn't much to hold on to with that little pistol! The polymer frame did suffer a hairline crack.
BTW, Ruger wouldn't sell me the replacement frame even though it was a non serialized part, however they replaced it for free.
The discolored brass is a PPU with a bulge, was the first test shot, had I found it I would never had shot the second round (MFS brass with a weird bottom formation) which had the blow out...
(https://i.postimg.cc/hvRfN72d/IMG-0584-zpsrfhsu7eh.jpg)
Here is a view of the bullet to show what I was loading; Not only heavy but long for this small cartridge.
(https://i.postimg.cc/tJdYbCcm/IMG-0587-zpsqlzu91ke.jpg)
I did work a useable load for this bullet using less powder that does 810 fps the energy is 182 ft lbs
Quote from: Intercooler on January 06 2017 03:18:01 PM MST
I'm reaching over to knock on some wood but... I have shot everything everyone else has, typically more of it and some stuff others haven't. I have yet to blow up a gun :o Have I been extremely lucky or got through a bad one then somehow?
Knocking on wood with you.
Off the top of my head bad stuff found before such events and pulled out:
- Precision One undercharged .357 Magnum rounds. I think I had two or three with almost no powder.
- PPU 10mm with some not up to par brass that could have allowed set-back. (this was from a so called commercial reloader)
- Underwood .44 Magnum with bullets not fully seated. I'm not sure of what could have happened there.
- Underwood 10mm squib round. I got lucky I wasn't hot-rodding and stopped immediately after hearing the poof. It took some work at home getting it out!
I generally look every box over now when I get them. Maybe I should do a pull test on the bullet? I also often weigh every round to see if I have anything way off in weight. If it's a new to me round, suspect, or supposedly loaded hot, I put on the Kevlar gloves and do my firing. More and more I'm thinking the gloves should always be worn when shooting 10mm/hot-loads.
Just to clear up the PPU issue it was not a factory loading but rather was from a so called commercial reloader.
Quote from: Intercooler on January 07 2017 06:32:50 AM MST
I put on the Kevlar gloves and do my firing. More and more I'm thinking the gloves should always be worn when shooting 10mm/hot-loads.
Link?
Quote from: Intercooler on January 07 2017 06:32:50 AM MST
More and more I'm thinking the gloves should always be worn when shooting 10mm/hot-loads.
Not an option for those of us who (sometimes) carry 10mm.
That 10mm brass in the photos is impressively thick near the aft end (and a good ways from the groove).
Intercooler,I added some info to your post about the PPU (that was reloads that were in PPU brass) May 2014
Also you sent 3 LAX rounds that the bullets were set back, for documentation. May 2014
Jan 2015 there was DT load that would not chamber too.
Dec 2013 there were some reloads you sent that were way over crimped that wouldn't chamber.
Quote from: Mike_Fontenot on January 07 2017 07:03:10 AM MST
Quote from: Intercooler on January 07 2017 06:32:50 AM MST
More and more I'm thinking the gloves should always be worn when shooting 10mm/hot-loads.
Not an option for those of us who (sometimes) carry 10mm.
I have Hatch and they have several options: https://www.amazon.com/s/?ie=UTF8&keywords=hatch+gloves+kevlar&tag=googhydr-20&index=aps&hvadid=153676722941&hvpos=1t3&hvnetw=g&hvrand=3982173646157270965&hvpone=&hvptwo=&hvqmt=b&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9008121&hvtargid=kwd-2519062056&ref=pd_sl_4g89vrejew_b
Quote from: The_Shadow on January 07 2017 07:37:35 AM MST
Intercooler,I added some info to your post about the PPU (that was reloads that were in PPU brass) May 2014
Also you sent 3 LAX rounds that the bullets were set back, for documentation. May 2014
Jan 2015 there was DT load that would not chamber too.
Dec 2013 there were some reloads you sent that were way over crimped that wouldn't chamber.
I guess I really have come across some garbage :o
Might be that some were not the best, but they did provide interesting info and learning experiences...so for all the ammo you have shared for us to get an indepth look...I thank You and many have also expressed thanks!
These were the bullets from the Dec 2013 over crimp issue that resulted in not chambering
(https://i.postimg.cc/Vkmqctg1/IMG-0439.jpg)
Quote from: Intercooler on January 06 2017 03:18:01 PM MST
I'm reaching over to knock on some wood but... I have shot everything everyone else has, typically more of it and some stuff others haven't. I have yet to blow up a gun :o Have I been extremely lucky or got through a bad one then somehow?
No doubt the Witness is a lot stronger than than the Glock 20. That doesn't mean that the Glock 20 isn't plenty strong for SAAMI spec, and beyond. It just means when you hit ammo that is out of spec, it will let go in a Glock before a Witness.
Ok undersized bullet causes a set back which changes the burn rate of the powder. Since I'm not a balliectis expert I'm just adding my 2 cents here. Compressed powder load in a rifle makes the power burn slower and with the projectile undersized and excited the barrel and there was no barrel or slide damage I would say the brass did not reach proper PSI to seal the chamber and lock the barrel into place. I agree recoil springs aids in the locking time but doesn't hold the slide into battery the pressure of the cartridge does.( Cool how John M. Browning was able to figure that out over 100 years ago).So the barrel unlocked prematurely causing the extraction to start and then the full PSI was more than the brass could handle causing the brass to rupture sending the gasses down the mag well causing the frame to hold just enough to keep the shooter from losing a hand. Seems like the pistol worked liked it was designed to. I don't like Glocks but that does not take away from them being great firearms. To me it's Ford or Chevy thing. :P Not saying anyone is wrong but the physics and mechanics is what brought me to my conclusion. :-\ I could be wrong but it is really early in the year for that. :)) I tell my wife I'm human I get once a year to be wrong.
Quote from: Condition 1-10mm on January 22 2017 01:43:13 PM MST
Ok undersized bullet causes a set back which changes the burn rate of the powder. Since I'm not a balliectis expert I'm just adding my 2 cents here. Compressed powder load in a rifle makes the power burn slower and with the projectile undersized and excited the barrel and there was no barrel or slide damage I would say the brass did not reach proper PSI to seal the chamber and lock the barrel into place. I agree recoil springs aids in the locking time but doesn't hold the slide into battery the pressure of the cartridge does.( Cool how John M. Browning was able to figure that out over 100 years ago).So the barrel unlocked prematurely causing the extraction to start and then the full PSI was more than the brass could handle causing the brass to rupture sending the gasses down the mag well causing the frame to hold just enough to keep the shooter from losing a hand. Seems like the pistol worked liked it was designed to. I don't like Glocks but that does not take away from them being great firearms. To me it's Ford or Chevy thing. :P Not saying anyone is wrong but the physics and mechanics is what brought me to my conclusion. :-\ I could be wrong but it is really early in the year for that. :)) I tell my wife I'm human I get once a year to be wrong.
Here is what I believe happened with mine. PPU brass too hard and sprung back after sizing. Insufficient bullet tension allowed bullet setback during chambering. The initial pressure (before a bullet begins moving) is a function of powder burn rate and the amount of room the gas can expand into, so less room means higher initial pressure. Because it was a warm load to begin with, it resulted in a total case head separation. By the shape of the ballooned brass, the glock remained locked during the event.
I'm not blaming the Glock. I'm blaming Privi brass and the Midway claim that it was reloadable. Any brass that won't hold its shape when resized is NOT reloadable brass!!!
Greg
Brass will work harden that is why you see annealing on military brass. I have reloaded some PPU brass several times and I still have it in rotation 9mm, 223 I don't think I have any 10mm PPU.( I think I would have come up with a different name for my company besides Double PU). I really didn't read all the post I just watched the video and looked at the pictures and read what the shooter said since he was there. I have had a few case raptures nothing dramatic and that was from over used brass. I have never had a head separation. Since there was no barrel or slide damage I could see from the pics this was the only thing I think could have happened. Projectile excited the bore hit the target. We are talking micro seconds. Delayed blow back works because the case is stuck to the chamber wall because of pressure. When the pressure goes down from the projectile exiting the barrel the slide unlocks and extraction begins under normal shooting. It takes several 1000 psi to stretch the brass to seal the chamber. So I am saying the psi need to stretch the brass did not happen fast enough allowing the slide to unlock and the extraction to start. As the psi went up the brass that had been extracted could not with stand the pressure and failed. As we get have mistakes we learn from them hopefully never to repeat them. When things like this happen we are luckily to have them on video and the shooter documents everything as well as they can so we as shooters learn from these things. I am very glad nothing but a few scrapes and bruises happened to the shooter. Underwood is replacing the damages to his firearm along with his underwear. I hate this happened but there is a lot to gain from this and to be happy for.
If you look in this thread a bit you will see the brass from my failed case. It fits the chamber to a tee. The location of the feed ramp matches the shearing of the brass in its seated position. The brass was fully seated during the event. If fact, the brass remained in the chamber while the case head was ejected. The flattening on the left side could only have occurred if the pistol remained in a locked position. My pistol did what it ws supposed to do. I see nothing in the article that would lead me to believe anything different with his.
His failure was more more extreme than mine. Mine cracked a frame, but it had to be twisted to see it. It blew the magazine out, but was undamaged beyond that.
Its been long enough my memory might be called into question, but I believe the PPU stuff was on its first reloading. The brass was hard to begin with. In my opinion its junk brass and there is a reason PPU is loaded as light as it is from the factory. Tear down of the remaining loads happened easily with the kinetic bullet puller.
I can't comment on the current quality, but it will be purged from my reloading brass. I back over it as I leave the range, then toss it into the spent brass bucket. If you choose to reload it, do so with extreme caution.
Greg
There was a thread on good brass and bad brass to reload... Glock talk if IIRR
( found it... 18 pages; http://www.glocktalk.com/threads/can-we-create-a-stick-on-good-vs-bad-brass-to-reload.846395/ )
Did you see This one?
QuoteCompany? (NNY)
BTW NNY is PPU in another language.
QuotePrvi Partizan-Namenska Proizvodnja, Titovo, Uzice 31000, Yugoslavia. These are actually Cyrillic letters equal to "PPU in the Western alphabet.
PPU = Prvi Partizan, 31000 Titovo, Uzice, Yugoslavia
Headstamp codes can be found here http://cartridgecollectors.org/?page=headstampcodes (http://cartridgecollectors.org/?page=headstampcodes)