AT LEAST a flash from a firearm is not like black clouds from a diesel truck, all that unburnt fuel is totally wasted. Adding extra powder is maintaining pressure after the initial spike, and has a nominal effect.   

Quote from: Kenk on May 11 2019 12:24:21 PM MDT
Anyone done any testing, or shot Steinel's ammo? It doesn't look like anything to write home about, but you never know.
Thanks

Ken

https://www.steinelammo.com/product/10mm-auto-180gr-jhp-20ct-golden-saber-1125-fps-4-5bbl/

1. Thanks for starting this thread, KENK!
2. As I understand it, most traditional (old school) hollow points need to be velocity limited in order to work properly, meaning not fragment, and not exit the "BG"  (bad guy) and maybe enter another unintended target.  Certainly the 10mm can over-power the standard weight (180gr) bullets, by a wide margin...

Not saying that to inform you by any means, just laying out the info as I understand it.  Now perhaps the bullet in question is better at staying in the BG w/o fragging, and could be driven a little harder?    I bought a few boxes of the Freedom XTP's (iirc) and my son said they are dead-accurate in both his 10mm platforms. Relatively soft shooters also, and they were cheap for a box of 50.  But that might not be a state of the art SD carry ammo, the XTP's have been around for a long time.  Your thoughts would be great to hear 👍

Quote from: Patriot on March 13 2013 04:31:09 PM MDT
Thanks everyone for being a part of our website. Keep spreading the word so we gain membership. Unlike the sites that compete with this one, my reward for having members is not money, its the knowledge that people actually enjoy it here as much as I do. It costs less than $10 a month to keep the site going. That's about a half hours work at my job so I won't need money from our members. Thank you all.

BRAVO!!!
I like the smileys lineup and the general old-school format, the only thing I'd like to see added would be a vote of approval that we could click to show appreciation for the content.  But only if it is part of the forum controls already LOL!!!  I am getting lots of good info here, and plan to extend my Handgun and PCC arsenal with more Mighty 10mm AUTO!   

This is the in-stock 10mm ammo for our local indoor range, I am thinking lite and cheap. My son used it on his break-in of the Kriss Vector and  Sig P220 that he bought there. It was under $20 for a box of 50...   

Thank You ALL!

I also had this question on castboolitZ  forum and came up with this and a few other ideas.
One fellow on there has a custom (but now IN STOCK!) 240gr 10mm Mold that feeds well,
so I kind of surmised that 240-250gr is about the practical limit for a good feeding 1.260
range WNFP 10mm.  What I did was order 100 each of the 240gr and 250gr bullets.  I
suppose I will need an "intermediate die" to go from .411 to .401 however. I did not see
that size available but I only checked one place so far... 

Quote from: Taterhead on May 27 2019 04:24:21 PM MDT
The heaviest 10mm bullet I've heard of is the DT 230 gr WFNGC, but it was reported to actually weigh 220. 220 being the upper end of the practical range.

Quite easy to get subsonic. I have a few pet loads that are charged with quick to medium burning powders that are very suitable for that task. The quickest burners are relatively quiet ander a 200 gr bullet. I've used 452AA (substitute WST), 231, No. 5, Unique, WSF, etc.

GREAT Info, we have a batch of 200gr bullets coming.  I want to further explore the heavy stuff, 41 Magnum bullets resized to .401 ca easily be found for 230, 240, 250 and up, but I think 250 is gonna be plenty.  I will likely just get a hundred 230gr and see how that does, checking case volume and so forth, then decide if a hundred of the next size is worth messing with. OAL's 1.250 and 1.260 are pretty common and I know it will likely feed very well. If I end up with 100 bullets that are "too heavy" it is not much money   About $16 from what I have seen, plus shipping. $25 is cheap R&D imo

Quote from: The_Shadow on May 26 2019 07:50:41 PM MDT
Well any load under 1100 fps would be considered (SUB SONIC at sea level).
230 grain is about as heavy bullet you can get in the 10mm and still have room for powder to give it a good push.
Most factory loads are under the 1100 fps with shorter barrels, however the 6"+ tube adds some velocity and can exceed the Sub Sonic velocity window.

Now handloading would allow you to detune your ammo for just the right performance level using the KV with the barrel length and can.  Staying with the 200 grain bullets (more common) you could load them to right at 1020 fps and stay under 1100 with the KV.

Remington, Speer, Federal, Winchester usually fall in the Sub Sonic as factory ammo even though its not stated on the box!  Testing has shown many don't reach their advertised velocities.

Check Lucky Gunner https://www.luckygunner.com/labs/10mm-auto-self-defense-ammo-ballistic-gel-tests/

I am with you, but I am using the term SUBSONIC like the 22lr mfg's do,  Standard Velocity is below Mach 1  but they use subsonic for QUIET.  We want custom loaded, subsonic, quiet 10mm capabilities. I am thinking about a 950fps loading (5" test barrel) specs would do it.  The extra weight is for better momentum and penetration once into the "absorbing medium" is encountered. Like pine boards, water jugs, 4 legged critters or the hopefully never encountered BG. (bad guy!)  We have a Town Marshall for a neighbor, and whilst he is a good guy, and an Air Force Vet, well, his wifey with young kids is just  bit paranoid and hates hearing gunshots. So we are limited to 22's and whatever we can get away with on a can.  Good neighbors and all that.    
I also see a lot of value in a thumper 10mm "SUB" and might even go 45 ACP with a caliber change for one or both of us, but doing something pretty new (at least for us) will be a great project for me and Sonny   

220+ for subsonics...
230, 240, 250 and maybe more?
I have seen that I can get 41 Magnum cast lead up to and over the 250 mark,
but it obvs needs resized. A Simple .401 heavy cast bullet is preferred. Ready
to work up the loadings, no problems there, but finding slugs is the hold up!

TIA!

Yeah, seemed like an oxy-moron to me as well, at first. But my son has just bought a Kriss-Vector 10mm SPD-E (E for enhanced) with a 6.5" barrel and folding tube for a brace. Threaded barrel, and he already has his Silencerco waiting for him in ATF "jail" until his sticker comes in. I saw an old reference to DoubleTap 230gr Subsonic but they don't list it on their site anymore.  I have found several places that make 180gr, 200gr and 220gr that include "sub-sonic loadings" of under 1100fps. This in my opinion, is basically "40 S&W Long" in some weights. The 2 questions are:

1. How heavy of a 40 cal bullet have you all heard of?

2. What Mfg's may have a true Subsonic 10mm round?

These are strictly for use with the can, I could foresee using a can and then using the gun for hunting with the heavy-hitters (supersonic).  It's really just that neither one of us wants to have a 40 S&W when we both have multiple 10mm arms and plenty of ammo.  I am also looking at the KV in the near future. I shot his and it's a really great platform!   

I may never get that 1006 I want   :'(

Plenty of other fantastic 10mm weapons to buy, however   

OK, got a new Witness Hunter coming, looking for info on this one such as compatibility with full power 10mm (I have a LOT of Underwood!) Also looking for grips, and a threaded barrel, ~6.6" or so total length. 

I take it that the 4.7 under Barrel for the 6" W.H. is barrel weight in ounces?  I like a 3# handgun, especially for the hotter loads 

Quote from: Big10 on January 02 2017 10:54:03 AM MST
Where my trigger finger reaches when I've got my thumb on the safety so that I can operate it properly.

Marco? Is that You??? 

JK, but it looks like your hands are just small for that particular weapon. It does appear to have a Big GRIP! 

Quote from: jbaker30 on February 18 2017 08:02:20 AM MST
I have a Glock 40, and a Remington R1 long slide hunter. I had no intention of getting another long slide, but while at the range last week with my R1 hunter I got the chance to shoot an EAA witness match 10mm, and I was impressed. So much so I ordered the EAA witness hunter yesterday. Should I have 3 long slides? It's hard too justify for sure. If it shoots as good as the match, well then I will have a new favorite! I should have it next week. Range report when I get a chance to get back to the range. Counting my EDC Glock 29 I have 4 10mm pistols now. Clearly I have issue's.
JB

Your only issue is that you are not cognizant of the FACT that is short barrel 10mm is just a 40 S&W in effect   

Congrats on the Witness Hunter! I have one on order, I should have it in 10 days or so!
We need to get together on grips, threaded barrels, etc    LMK if you have any leads, jbaker!

Ran a box of 20 Buffalo Bore HC Lead through a Gen3 G20C and noticed no lead build-up...
Recoil was not bad, considering the lightweight frame, but you guys have spoiled my
expectations talking about S&W 1006 and Witness Hunter recoil with full-house 10mm 

I was putting all rounds within a 6" pattern at ~10yds 

Saw 3 S&W 1006 in current auctions last night, $1300, $1700, and $2600     

Crazy Money for one! Even the low-priced one, but I doubt they get any better...