180gr bullets over Longshot

[REDLINE]

I'll be adding more after I get out to test some more.

Happy Reloading!

Nice work.  I look forward to the results of your future batches.

[Turo]

Well, I went out to test some more today and never got past my 155gr tests.  Blew the extractor out of the gun and the case blew out.  Shooting is over for today and until I can get a new extractor and have an armorer check the gun out I'm not going to be able to post any more. 

[sqlbullet]

First, are you OK.

Second any pics of the brass that blew?

[Turo]

First, are you OK.

Second any pics of the brass that blew?

Yep, and yep.  My trigger finger stings a little, and I got some powder burns on my support hand thumb, but I'm no worse for the wear, it just scared the piss out of me for a second.  Also, don't tell my mom, but I said a bad word when it happend .   The mag flew out and I lost the extractor, which made me drop the gun in the dirt. 

Luckily, everything still slides, clicks, and sproings like it's supposed to so I think it is most likely okay, but I need it to get looked over just in case.

I just got the broken case out of the chamber, and it looks like I just had a premature unlocking of the breech, because the case is bulged out too far down the case.

The pictures are coming in a minute, I've got to upload them from my phone. 

I just need to make sure that everybody knows the load that blew up is NOT the loads mentioned in this thread.  It was a completely different bullet weight and powder weight.

[Turo]

Here ya go, I still need to get a picture of the case by itself, I'll add it to this post.




Here's the casing by itself:

[REDLINE]

Well, I went out to test some more today and never got past my 155gr tests.  Blew the extractor out of the gun and the case blew out.  Shooting is over for today and until I can get a new extractor and have an armorer check the gun out I'm not going to be able to post any more.

Glad things didn't turn out any worse.  I'll look forward to your now further-in-the-future-results.  Did you by chance get a velocity reading on that last round?

[Turo]

Well, I went out to test some more today and never got past my 155gr tests.  Blew the extractor out of the gun and the case blew out.  Shooting is over for today and until I can get a new extractor and have an armorer check the gun out I'm not going to be able to post any more.

Glad things didn't turn out any worse.  I'll look forward to your now further-in-the-future-results.  Did you by chance get a velocity reading on that last round?

.

Yep.  It was the second round of my 155gr XTP and 11.0gr longshot.  Once fired brass.  The first shot was 1401 fps, and the busted round gave a velocity of 1115 fps.

[REDLINE]

Well, I went out to test some more today and never got past my 155gr tests.  Blew the extractor out of the gun and the case blew out.  Shooting is over for today and until I can get a new extractor and have an armorer check the gun out I'm not going to be able to post any more.

Glad things didn't turn out any worse.  I'll look forward to your now further-in-the-future-results.  Did you by chance get a velocity reading on that last round?

.

Yep.  It was the second round of my 155gr XTP and 11.0gr longshot.  Once fired brass.  The first shot was 1401 fps, and the busted round gave a velocity of 1115 fps.

Wow.  I say wow because Mike Willard of Swamp Fox (may he RIP) had 2 different 10mm 155gr XTP loads available.  One at 1450fps from a G20 4.6", and another at 1525fps from a G20 with a 4.6" aftermarket barrel (aftermarket barrel only load).  On top of that there is reasonable suspicion to at least suspect he was using Longshot powder to achieve those velocities, and he didn't fudge on his quoted velocity specs.  Bottomline, even your 1401fps reading doesn't get you there.  I wonder if it's just because you started out with once fired brass, whereas Mike Willard only used new brass and refused to even size it before loading it.  Anyways, food for thought, and I'm glad your digits are still in tact!

[sqlbullet]

I suspect it is the once fired brass + a little bit of premature unlock.  I too only use new brass for max loads.  After that it becomes practice brass.

Glad you are OK and hope the gun checks out as you expect.

[Turo]

Wow.  I say wow because Mike Willard of Swamp Fox (may he RIP) had 2 different 10mm 155gr XTP loads available.  One at 1450fps from a G20 4.6", and another at 1525fps from a G20 with a 4.6" aftermarket barrel (aftermarket barrel only load).  On top of that there is reasonable suspicion to at least suspect he was using Longshot powder to achieve those velocities, and he didn't fudge on his quoted velocity specs.  Bottomline, even your 1401fps reading doesn't get you there.  I wonder if it's just because you started out with once fired brass, whereas Mike Willard only used new brass and refused to even size it before loading it.  Anyways, food for thought, and I'm glad your digits are still in tact!

I think you're right, because these loads weren't anywhere near what many others have loaded. Only 11.0 gr longshot when I've seen upwards of 12 gr.

Thanks for the concern, my trigger finger is a little sore today, but otherwise perfectly fine.

[The_Shadow]

Wow Turo! That's not suppose to happen!  Star Line is marketed as a brass for reloaders but here lately I am having my doubts.

Was this from the G-20 Stock pistol w/barrel?

[Turo]

Wow Turo! That's not suppose to happen!  Star Line is marketed as a brass for reloaders but here lately I am having my doubts.

Was this from the G-20 Stock pistol w/barrel?

That's correct.  All stock gun.

I was really surprised that the case sheared like it did, it almost made it look like the brass was made in two pieces with the case head just force fit into the case wall.  I know it isn't, but the break makes it look that way.

[sqlbullet]

For max loads I would really suggest a heavier recoil spring in the Glock.  I would guess you are seeing large extreme spreads in velocity as well, which is caused by the action unlocking prematurely.  I think The_Shadow has seen this as well.

A heavier recoil spring will slow the timing and keep the action locked up a little longer.

[The_Shadow]

Turo, when you slide the damaged case back into the barrel and align the case head orientation as it was, does the case head stick above the barrel shroud?  I know there is the tearing and stretching, but you are looking to see if the slide pulled the casing back from the chamber too early which would be indicated by an out of battery expansion.  With the case body in the chamber, you could also look inside the chamber to see if the casing is backed away from the end of the chamber cut.  This would indicate early unlock situations before the pressure dropped. 

The G-20's have a slightly different locking lug arrangement that the G-29's besides the longer barrel.  But extra power recoil springs could help the in battery lockup dwell time.

[Turo]

For max loads I would really suggest a heavier recoil spring in the Glock.  I would guess you are seeing large extreme spreads in velocity as well, which is caused by the action unlocking prematurely.  I think The_Shadow has seen this as well.

A heavier recoil spring will slow the timing and keep the action locked up a little longer.

Yep.  I'm looking into the heavier recoil springs as well, any opinions on brands?

Turo, when you slide the damaged case back into the barrel and align the case head orientation as it was, does the case head stick above the barrel shroud?  I know there is the tearing and stretching, but you are looking to see if the slide pulled the casing back from the chamber too early which would be indicated by an out of battery expansion.  With the case body in the chamber, you could also look inside the chamber to see if the casing is backed away from the end of the chamber cut.  This would indicate early unlock situations before the pressure dropped. 

The G-20's have a slightly different locking lug arrangement that the G-29's besides the longer barrel.  But extra power recoil springs could help the in battery lockup dwell time.

The casing was partially extracted when it blew, a rough estimate I made when I first field stripped it is about 3/32 of an inch gap where the case was supposed to headspace.