G20 KaBoom update

Intercooler · December 06 2013 06:08:24 PM MST

One thing I don't do with the warm stuff is Cowboy shoot. Nice pause between shots because you never know.

blastfact · December 07 2013 04:53:05 PM MST

#1 - The Nosler 135gn JHP is a near worthless bullet in 10mm/.40. It can go real fast and be near worthless concerning construction and SD. And this is one of the few bullets that SD really makes the difference. In this weight and caliber a so so 125gn .357 mag really is a better load.

#2 - One should be able to get a discount if they buy a Glock NIB less a OEM Glock barrel! My OEM G-20 barrel has never had a round one shot through it. It's so whore loose chamber wise I would never subject real 10mm ammo to it's dimensions. Much less .40 short&weak class ammo.

Geeman · December 07 2013 05:37:02 PM MST

Quote from: blastfact on December 07 2013 04:53:05 PM MST
#1 - The Nosler 135gn JHP is a near worthless bullet in 10mm/.40. It can go real fast and be near worthless concerning construction and SD. And this is one of the few bullets that SD really makes the difference. In this weight and caliber a so so 125gn .357 mag really is a better load.

#2 - One should be able to get a discount if they buy a Glock NIB less a OEM Glock barrel! My OEM G-20 barrel has never had a round one shot through it. It's so whore loose chamber wise I would never subject real 10mm ammo to it's dimensions. Much less .40 short&weak class ammo.

Why don't you tell us what you REALLY think ${$default_tongue_smiley}$

Greg

Geeman · December 07 2013 05:47:32 PM MST

Pics

One side

The other side, never found the missing piece.

It won't go back together. Shows how big the missing piece was.

The chamber with a loaded round.

Above pic of case head on the blown case.

The rest of the spent rounds from the day

blastfact · December 07 2013 05:56:25 PM MST

That was defective PPU Brass. And striped brass support.

Geeman · December 07 2013 06:02:02 PM MST

Quote from: blastfact on December 07 2013 05:56:25 PM MST
That was defective PPU Brass. And striped brass support.

I could be wrong, but I think any piece of brass would have blown being that far out of the chamber with that much pressure still present. I'm not saying it was top notch stuff, but I don't think any would have a prayer of holding.

Greg

blastfact · December 07 2013 06:15:43 PM MST

If your sure of your powder load. Thats a brass failure with sorry Glock OEM barrel. While many shoot your powder in 10mm. It's not a powder I would use. Nor will I use that bullet anymore.

There is a chance that was a double detonation shot. But that is a very very slim option seeing how fast the powder is versus the bullet weight and diameter.

palabman · December 07 2013 06:33:15 PM MST

Quote from: Geeman on December 07 2013 06:02:02 PM MST
Quote from: blastfact on December 07 2013 05:56:25 PM MST
That was defective PPU Brass. And striped brass support.

I could be wrong, but I think any piece of brass would have blown being that far out of the chamber with that much pressure still present. I'm not saying it was top notch stuff, but I don't think any would have a prayer of holding.

Greg

I wouldn't trust PPU brass for anything but plinking loads. I've had factory loads split and they were loaded on the light side. YMMV

Intercooler · December 07 2013 06:33:26 PM MST

I would just like to say you guys scare the crap out of me ${$default_wink_smiley}$

Can you take some measurements of the other brass (especially the PPU's) right above the extractor groove?

Intercooler · December 07 2013 06:37:07 PM MST

I'm looking at your brass there and the Kaboom round has a different "crows foot" primer mark (very long) compared to all the rest. Actually all the ones in the box look almost identical. Something happened with the charge or the lock-up on the Kaboom round.

Intercooler · December 07 2013 06:53:36 PM MST

I joke around about "Glock gloves" often, but I have a pair of Hatch Kevlar gloves I am really fond of. Today I put them on myself and find them a great fit with full function. Lately due to cold and some questionable shooting I glove up and have gotten really accustomed to them!

http://www.amazon.com/s/ref=nb_sb_noss_1?url=search-alias%3Dsporting&field-keywords=hatch+kevlar+gloves&rh=n%3A3375251%2Ck%3Ahatch+kevlar+gloves

The_Shadow · December 07 2013 06:57:10 PM MST

The mark is a striker drag mark most likely. The slide traveled rearward allowing the barrel to tilt down with striker still in contact with the primer. Either that or it got stamped by something else in the dynamic event.

PPU brass has shown blowouts in other incidents and not just 10mm. I am leaning toward poor quality brass, case head failure, separated case head started early ejection, by pushing the slide back causing the barrel to unlock, with brass stretching to fill the voids, venting gas pressure. The captive recoil system may also have not applied enough initial pressure to help maintain lockup!

The_Shadow · December 07 2013 07:06:36 PM MST

May I ask, how you clean your brass? Dry tumble or Wet?

Do you use any polish for your brass? If yes, does it have ammonia in the formula? Ammonia is known to attack the brass chemically... ${$default_huh_smiley}$

Geeman · December 07 2013 07:16:38 PM MST

Quote from: The_Shadow on December 07 2013 07:06:36 PM MST
May I ask, how you clean your brass? Dry tumble or Wet?

Do you use any polish for your brass? If yes, does it have ammonia in the formula? Ammonia is known to attack the brass chemically... ${$default_huh_smiley}$

I do ultrasonic, 1 part white vinegar to 5 parts water along with a drop of dawn dish soap. rinse well by saoking in water a few minutes. Vinegar will also etch brass, but its about 24 minutes total.

Greg

blastfact · December 07 2013 07:24:43 PM MST

Inter and Shadow

I think we can all agree on a striker drag.

Look at the other fired brass. All of it shows the classic Glock smeared striker retraction mark. Glocks are known for this regardless of caliber or load. If you want to look for a brass bulge concerning Glock anything barrel. Just look below the lower striker/primer bulge.