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Old February 19, 2012, 03:41 PM   #1
thealex
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.45 acp charge?gun issue?

Hello, Been loading my Glock 21 g4 the last month or two and I have had about 7-8 hiccups with the slide not fully closing after firing. It stops with the extractor sitting on the bottom of the case. A quick cycle causes it to cycle normally. As does hitting the back with my hand.
1st few were in a batch of 150 with 230 fmj with NO#5 at 8.2-8.3 g (they were 2 different loads)
2nd few were a load of 50 Hornady 200g hp with Blue Dot at 9.8
According to the few manuals that I have these are all middle of the road loads for these rounds.
The gun also does not like to drop a bullet in the chamber and release the slide. It more often than not causes the same issue.
I am fairly certain I am not limp wristing as I have been using both hands each time this has occurred.
I have ran about 400 other hand loads with no issue, about the same in factory loads with also no issue.. Any ideas other than Glock bashing? I've heard most of those already
Also my oal has been 1.273- 1.274 Thanks. Alex

Called Glock today. My pistol has the new spring as it was manufactured in Nov 2011

Last edited by thealex; February 20, 2012 at 08:17 PM. Reason: Update
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Old February 19, 2012, 05:22 PM   #2
arch308
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Just a few thoughts from a fellow G21 owner. I have never had that problem and I use my reloads exclusively. Are you taper crimping enough? I know the case seats on the mouth but too much bell could cause the problem possibly. A dirty chamber? Also Glocks tend to buldge the brass so maybe you aren't sizing them all the way or the brass is worn out.
Also I don't see the reason to hand feed a round to the chamber.
Limp wristing can cause problems with the 21, but you said that's not the problem.
Wish I could be more help.
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Old February 19, 2012, 05:39 PM   #3
David Bachelder
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Possibly Glock Bulge.

More common in the S&W .40, but possible in any Glock.
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Old February 19, 2012, 06:16 PM   #4
243winxb
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Is brass all the same or different head stamps? Range brass? Make sure the extractor moves freely.
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Old February 19, 2012, 06:52 PM   #5
thealex
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They are different brass. most of it has only 1 or 2 loads on it though. I have noticed the pmc and remington brass is not as sturdy as the federal and winchester so I am planning on removing those.
I am going to lessen the bell also.
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Old February 19, 2012, 07:36 PM   #6
TXGunNut
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With the barrel removed from the slide will the cartridge drop freely into the champer? Does the extractor move freely? If so I'm guessing the load is a bit too mild. Factory loads are close to a max load and the Glock is designed for factory loads.
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Old February 19, 2012, 07:57 PM   #7
thealex
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The extractor does appear to move smoothly. I have considered the loads not being hot enough but as I am relatively new to this again(I haven't reloaded for about 10 yrs) I have been trying to stay middle of the road.

It still does not like being dropped on a round, I haven't ever experienced that with a semi auto before? This gun has about 1200 rounds through it and was purchased new Jan 2012. Alex
Using No #5 and Blue Dot.
Just purchased some Unique to try.
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Old February 19, 2012, 08:14 PM   #8
243winxb
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Glock G4 Recoil Spring Recall

I remember reading something about a Glock g4 recoil spring recall. Could that have something to do with it? http://us.glock.com/customer-service...pring-exchange

Last edited by 243winxb; February 19, 2012 at 08:20 PM.
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Old February 19, 2012, 08:24 PM   #9
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Quote:
Are you taper crimping enough?
+1
Reloads that my Colt happily digested jammed in my buddy's Glock -- tightening up a pinch on the crimp solved the problem.
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Old February 19, 2012, 08:39 PM   #10
thealex
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@243winxb

The local gun shop had to order it. I will call Glock tomorrow to see if it affects me. I didn't think so because it was 6 months later but you never know.

I am also going to reset and dial in all 3 dies again. Alex
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Old February 19, 2012, 09:34 PM   #11
jef2015
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If you drop a round in the chamber and release the slide the extractor will get in a bind when you release the slide and can be damaged. You should always feed from a magazine. That could be the problem on the rounds you drop in the chamber.
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Old February 20, 2012, 08:30 PM   #12
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Not familiar with a G4 model 21 but a load of 8.2-8.3 grains of AA#5 is not a light load. Nearly maximum in my opinion. Should cycle a G21 230 fmj load every time, at least it does my 2nd Gen G21 and I've loaded down to 7.8 grains and up to only 8.2. Possibly sizing or crimping issues or the new G4 has recoil spring problems? I seat 230 fmj's to 1.260" but I don't think your longer seating would ever near the rifling of a Glock barrel. Blue Dot powder is one of the slowest powders for a 45ACP and maybe too slow. AA#5 though is ideal. I would try seating just a little shorter with 230fmj's from 1.260-1.265" to check if that improves reliability.

Last edited by rg1; February 20, 2012 at 08:50 PM.
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Old February 20, 2012, 09:10 PM   #13
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I would say check the crimp. Run a sized unprimed case for a feeler into the seating die for using to adjust.

Next is a question. How hard are the rounds to extract. If it takes more effort to extract them it is a good indicator of either the case flare has not been full removed, or the bullet is too far out into the lands.
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Old February 20, 2012, 10:47 PM   #14
243winxb
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You have the new spring, that should rule that out. Thread: Glock extractor changes. > http://www.firearmstrainingandtactic...ead.php?t=1546 I did not read it.
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Old February 20, 2012, 11:17 PM   #15
chris in va
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My lyman manual shows a max charge of Blue Dot at 9.7 with a 200gr jhp. It's not terribly high in pressure or fps though.

How well do they pass the 'clink' test with the barrel removed?
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Old February 20, 2012, 11:31 PM   #16
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Totally different GUN but my 1911's loads had the same issue using lead bullets

A trip to my local reloading store ,came back with a WILSON .45 ACP GAGE and a factory
Lee crimp and my 1911's eat those bullets like fish in a tank.
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