180gr bullets over Longshot

[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.

[sqlbullet]

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

I think you got this answer elsewhere.  Round = smoother, flat = last longer.

I run round 22-24 lb from Wolff in all my guns, but their isn't a glock among them.

[The_Shadow]

I have read where many like the ISMI recoil rod & spring for the G-20's but some have had success with the Wolff springs.  One thing that was mentioned was they thought the round springs like Wolff were bunching up in the G-20 which added drag to the slide that hampered reliable feeding.  Not sure if they were the Wolff Gun Springs product or other...they were the round wire though.

LWD has an article on their website if I recall.

[REDLINE]

...until I can get a new extractor and have an armorer check the gun out...

How's that working out?

[Turo]

...until I can get a new extractor and have an armorer check the gun out...

How's that working out?

I stopped by the gunsmith right after work today, he said the gun doesn't look damaged, there's no cracks in anything that he can see, nor any bulges in the barrel.  He pretty much echoed what everybody has said here, that the gun unlocked prematurely, even though the load didn't seem too hot.  His suggestion was to run some softer loads through the gun to test function and if it passed that test then it should be gtg.

Oh, and the new extractor came in yesterday, so I'm good to go there as well.

[REDLINE]

...until I can get a new extractor and have an armorer check the gun out...

How's that working out?

I stopped by the gunsmith right after work today, he said the gun doesn't look damaged, there's no cracks in anything that he can see, nor any bulges in the barrel.  He pretty much echoed what everybody has said here, that the gun unlocked prematurely, even though the load didn't seem too hot.  His suggestion was to run some softer loads through the gun to test function and if it passed that test then it should be gtg.

Oh, and the new extractor came in yesterday, so I'm good to go there as well.

Good to hear!

[nickE10mm]

Thanks for posting, Turo.  Good info... and info that closely matches that which I've also gotten.

Let me tell you about Longshot's power curve.... with 200gr XTP's, I'll also notice a point which velocity stops going up and actually often goes DOWN a bit.... but when I kept pressing slowly upwards, it got back on track and kept producing higher numbers.  Not to say that the loads are within book values... they are not... HOWEVER, I took a 200gr XTP up to 9.4gr LS in new Starline (CCI300 primers) and got 1325 avg from my 6" Fusion.  THAT load ain't no slouch.       I get close to 1375fps from a 180gr XTP with only 9.5gr LS.

[Turo]

Thanks for posting, Turo.  Good info... and info that closely matches that which I've also gotten.

Let me tell you about Longshot's power curve.... with 200gr XTP's, I'll also notice a point which velocity stops going up and actually often goes DOWN a bit.... but when I kept pressing slowly upwards, it got back on track and kept producing higher numbers.  Not to say that the loads are within book values... they are not... HOWEVER, I took a 200gr XTP up to 9.4gr LS in new Starline (CCI300 primers) and got 1325 avg from my 6" Fusion.  THAT load ain't no slouch.       I get close to 1375fps from a 180gr XTP with only 9.5gr LS.

I believe I saw that in my testing, but I haven't seen much of the rise yet.  At about 10.0 gr, I was starting to see bigger velocities out of my stock length barrel, and I've got 10.1, 10.2, and 10.3 loaded up and ready to test next outing to see what I can get out of those, but I need to grab a higher power recoil spring first after the fiasco with the 155gr loads.

[REDLINE]

...I've got 10.1, 10.2, and 10.3 loaded up and ready to test next outing to see what I can get out of those,...

Can't wait to see the results.  Though hopefully nothing catastrophic this time!

[The_Shadow]

Any loads above 10.0 grains of LongShot would be more than SwampFox used in his 10mm loads with 180 gr. and 200 gr. bullets based on discussions with (Mudrush) Mike Willard when he was active on the GT forum.

Therefore be very careful...

[Turo]

Any loads above 10.0 grains of LongShot would be more than SwampFox used in his 10mm loads with 180 gr. and 200 gr. bullets based on discussions with (Mudrush) Mike Willard when he was active on the GT forum.

Therefore be very careful...

My google-fu has failed me, do you have a link to any of those threads?  I haven't shot the 10gr+ loads yet, I've got a new 24lb recoil spring coming in the mail that I'll be using for new load testing, but I'd like to see any info Mike had on his 180gr offerings.

[The_Shadow]

This was over at Glock talk, http://glocktalk.com/forums/showthread.php?t=1357227
July of 2011, you may find his words of interest...

[Turo]

This was over at Glock talk, http://glocktalk.com/forums/showthread.php?t=1357227
July of 2011, you may find his words of interest...

Very interesting, thank you for sharing.

[10mil junkie]

With the 180gr hornady fmj I am averaging 1370  with 9.5gr of longshout out of a glock 20...
Same bullet with 9gr of longshot average 1295 this is my plinking load...
Waiting on my 1911 to return from the gunsmith to see what velocities I will get with it...