I have a Glock 20 and a 40 MOS, shortly after I bought them I realized the brass was bulging at the bottom and bought KKM barrels for both of them. Shot both a lot but mainly the 40 with a mixture of mostly PPU with some Underwood and Double Tap.
So the other day I got out the huge bags of brass to start decaping pryor to cleaning and realized that the primers were missing in about 80% of the cases, the primers that were still there seemed perfictly normal.
So I took a small ball guage and miced the grove dia. and the stock Glock barrels were .4015 and the KKM were .3998, I don't have any way gauge the land dia. other than turn down a plug or something. Any ideas or thoughts ?
Are you saying the primers blew out?
What was the loading that was being tested when the primer were missing?
Could they have been deprimed before they went in the bag?
Primers are just gone, this was factory ammo. just went thu it all and 100% of DT and Underwood has misiing primers and about 75 ppu out of a gallon ziploc bag had the primers still there.
I just picked it up and put in bag for later and now i'm trying to figure it out.
And the primers are just gone? They didn't get jammed in the gun or anything like that?
I could see DT and Underwood having pressure issues in a tight barrel but I have a hard time seeing PPU having issues unless the barrel is REALLY tight.
you say the primers in the cases that still have primers look fine? no pressure signs?
did you perhaps decap them and simply forget?
-matt
Something isn't right... Have never seen a blown primer on over 2k commercial rounds of various types
to have that many is def odd.
Tho i thought the UW 155/165s had a chance to do so ( start of smile )
That is strange. I can see 1 or 2 primers popping out of the DT or Underwood, but PPU is weak.
Have you ever sleep de-primed? It is like sleep walking, but you de-prime brass instead of walk.
.
I don't know I have been letting them pile up, you do kind of go into a trance after a while depriming. Maybe age is creaping up on me but I think I would remember depriming 1000 rds. Anyway I'm going go to the range and shoot 50 rd. thru the Glock barrels and the KKM barrels and check them all.
It would be hard to believe that you would not see the blown primers when picking up brass.
I know I would.
Most were shot at an indoor range with all kinds a assholes around and brass everywhere.
And I only picked up 30% at best
Quote from: ElCoyote on April 20 2017 05:11:02 PM MDT
Most were shot at an indoor range with all kinds a assholes around and brass everywhere.
lol :)
Quote from: ElCoyote on April 20 2017 05:11:02 PM MDT
Most were shot at an indoor range with all kinds a assholes around and brass everywhere.
I think I have been there before also. :)
Quote from: BEEMER! on April 20 2017 05:02:16 PM MDT
It would be hard to believe that you would not see the blown primers when picking up brass.
I know I would.
Especially the quantities you are talking about.
Quote from: ElCoyote on April 20 2017 05:11:02 PM MDT
Most were shot at an indoor range with all kinds a assholes around and brass everywhere.
I been there done that, but most of the time they are not so much assholes vs idiots..They are polite but just not too savvy about range etiquette / safety.
One thing is for sure is the primer pockets may be stretched out. Testing to see if they will even hold a new primer will show if they are LOOSE pockets.
Now, I did do an experiment once with a badly SMILED casing with a blown primer, the pocket was expanded and would not hold a primer. I did a pass-through sizing using my Lee FCD as the sizer die and it did squeeze the pocket section a little tighter, but not like new.
You're on your own if you want to try this...
You could possibly test the pockets after pass through sizing. Another option is applying some sealant to hold the primer in place.
I have used nail polish as sealant for shotgun primers.
This may get you another use out of the brass for target loads.
I would not shoot the gun until you have this worked out.
Hey wait, no one else was shooting 10mm, right?
There is plenty of 40 brass allover the place and if you pick up brass the RSO is watching and if you pick up too much brass you get bitch bites all over your back before you can stand up. Will go and shoot and catch all brass and check it monday to check this out, maybe this is like childbirth and the pain of decaping a shit load of brass just kind of faded away. I shoot and reload a lot.
Great thread!
lol :)