Glock woes

[gto.kroh]

I was at a competition last weekend and experienced a glock jam..... never had the issue before but it did it twice. Fire one round and the following round would feed but failed to go 100% into battery and I had to put the slide against a solid object and push to get it to release and extract.. the range officer was as shocked as I was.


The cases were stopping just short of the ring on the base and that's where it would lock up.

These are reloads. Mixed commercial brass
Bullseye powder somewhere around the 4gn mark (would have to check for an exact) cci magnum primers and hornady hap 115 gn projectiles.


The gun ran fine all day till the fourth and final stage. Upon disassembly at home I noticed the gun was incredibly dirty.


Was it the bullseye making excessive carbon and that caused my failures?

The gun is fairly new. About 2000 rds total through it. And I have been running this load through it the entire time with no issues till new.



One other thing I noticed. It was still cold(snow outside cold) when I developed these loads. The shoot was about 90 deg and I noticed the pistol was a lot snappier on recoil and my p.o.a was lower than normal..6"to 10" lower. So my assumption is the powder was dramatically effected by the heat and causing higher pressures and increased velocity..... and it was running much dirtier than previous loads.

 

[eldon519]

Measure some of your resized cases just above the rim groove. Sounds like your resizing die might not be going down far enough. Or the bullets could be seated too long and jamming into the rifling. Either can cause a jam like you describe.

 

[GLOOB]

Fire one round and the following round would feed but failed to go 100% into battery and I had to put the slide against a solid object and push to get it to release and extract..

When is the last time you chamber checked your reloads? I would take the barrel out and see if those jammed rounds will fit, if you still have them. Check a sample of your reloads, if you don't. If any of your bullets don't fit, clean your chamber and try again. Sounds like the bullet is sticking in the throat/rifling (which in a 9mm Glock means you are using an aftermarket barrel, fo sho), or the case mouth is sticking in the end of your chamber. Double check your OAL, bullets, and crimp.

It's odd that your reloads would burn dirtier in hotter weather. I would have thought the opposite.

 

[LiveLife]

I would make sure the mixed brass were full-length resized so they would drop in the chamber freely with a "plonk/plink". When I resize a brass that requires extra effort, I assume it may be overly expanded and check if I see daylight between the bottom of the die and top of shell plate/holder. If the resized brass won't pass the barrel test, it gets culled/recycled for bulk brass.

Due to rough handling by shipping companies dropping heavy bullet boxes, bullets can arrive at your door out of round. Out of round bullets will produce out of round finished cartridges that may not fully chamber in your barrel, especially when dirty - http://www.thehighroad.org/showthread.php?p=9898740#post9898740

As part of my QC, I checked my finished match reloads with my match pistol barrel. Better to catch an out of spec round before you have a jam during your stage.

 

[blarby]

Sounds like a sizing issue.

Either the case isn't getting into the die far enough on the upstroke, or you have a "tall" shellholder.

Is this by any chance your first batch of reloads using this tooling ? Some make small batches, some large ones... Sometimes at the end of a large batch things can get loose and sloppy.

As a few have stated, chamber checks can be crucial on some guns, especially with mixed brass.

I can't think of any amount of soot that would make a glock not run.

If you could give us some measurements from the base of the brass ? Maybe you got some slightly "glock bulged" cases that the sizer only partially removed ? That was the one thing I really disliked about my 23, having to "bulge bust" the brass every run... Seemed like 2-3 pieces out of every batch of 500 got a little "bulgy", so I just made the full push through sizing part of the operation done by the bulge buster mandatory.

Kinda miss that gun, regardless.

Anyway !

Less of an issue for my revolvers, but I chamber check every single round for my wife's autoloaders. It keeps her happy and jam free- especially in 357 Sig.

 

[Steve C]

A. You may be seating out too long and the bullet is engaging the rifling before fully chambering. Check the bullet to see if it has any marks.

B. Your case is out of spec, either bulged or the case mouth belling hasn't been completely removed. As suggested one should chamber check their first reloads after setup and compare it to a factory round in a removed barrel. If they pass this "plunk" check then it should chamber properly when at the range and any problems are not due to the ammo's dimensions.

 

[gto.kroh]

I believe it's due to bulged brass. I'm not too sure my rcbs die likes my 1050 that much as I don't set it up to cam over on my shell plate and set it a touch shallow...... I'm going to try a dillon die. I am told they are undersized and they are designed for the press. And not my first batch. Like I said. I have run 2000 through with no issue. All my reloads. But since I switched to the dillon I think that's the batch that gave me issue. Thanks guys

 

[longdayjake]

What you described in your last post is likely the reason you experienced this jam. I've found that this problem is most prevalent with nickel cases as well. They don't seem to want to resize as easily as brass ones do. Progressive reloading makes this an even bigger issue.

I'm going to try a dillon die. I am told they are undersized and they are designed for the press. And not my first batch. Like I said. I have run 2000 through with no issue. All my reloads. But since I switched to the dillon I think that's the batch that gave me issue

I run dillon dies and I still get this issue if my dies aren't seated down all the way. You likely will too.

 

[LiveLife]

+1.

I was at a competition last weekend and experienced a glock jam..... never had the issue before but it did it twice ... round would feed but failed to go 100% into battery and I had to put the slide against a solid object and push to get it to release and extract.

I believe it's due to bulged brass. I'm not too sure my rcbs die likes my 1050 that much as I don't set it up to cam over on my shell plate and set it a touch shallow...... I'm going to try a dillon die. I am told they are undersized and they are designed for the press.

By "never had the issue before" do you mean before changing to Dillon 1050?

Before you change dies, I would take apart the round that did not fully chamber and resize while looking at the die/shell plate closely. If you see daylight, I would adjust the resizing die so it barely "kisses" the top of the shell plate.

If you must change dies, consider changing just the resizing die. I have found Lee carbide sizing die to resize further down on the case with smaller OD than RCBS/Dillon dies due to the shape of the carbide sizer ring/mouth radius of dies. Although I like Dillon dies for my 650, I prefer to use Lee resizing dies.

I have run 2000 through with no issue ... But since I switched to the dillon I think that's the batch that gave me issue.

If you used the same dies before switching to the Dillon press and did not have chambering issues before, I would definitely look at the sizing die adjustment first.

All my reloads.

But you could have picked up someone else's overly expanded/bulged brass.

 

[blarby]

Excellent stuff.

New tools can throw mighty interesting curveballs, eh ?

 

[rsrocket1]

Bullseye is naturally very sooty, but it shoots well so long as it is up to pressure. If it is below 10,000 psi, it becomes even sootier. Your load may be boarderline. If you aren't plunk testing every round you should. After a while, you will get a feel as to how much margin you have with your plunks. If they are snug, then something as marginal as added soot can make a difference between flawless shooting and jammed cases. Take a 3# plastic mallot with you (Harbor Freight) in your range bag. A gentle whack with the mallot will persuade the bullet to go fully into battery. That's if you are sure it successfully plunked on your loading bench. If you didn't test it, all bets are off.

 

[jmorris]

Never owned a case gauge before I shot competitively. I don't fire a single round on the clock that hasn't passed a case gauge now.

 

[Seabeeken]

Do the plunk test. Had same issue once and the needed more taper crimp. Problem went right away.
Drop them into chamber by hand and see if they go fully into chamber, if not apply more crimp and try again

 

[entropy]

I was at a competition last weekend and experienced a glock jam..... never had the issue before but it did it twice. Fire one round and the following round would feed but failed to go 100% into battery and I had to put the slide against a solid object and push to get it to release and extract.. the range officer was as shocked as I was.


The cases were stopping just short of the ring on the base and that's where it would lock up.

These are reloads. Mixed commercial brass
Bullseye powder somewhere around the 4gn mark (would have to check for an exact) cci magnum primers and hornady hap 115 gn projectiles.


The gun ran fine all day till the fourth and final stage. Upon disassembly at home I noticed the gun was incredibly dirty.


Was it the bullseye making excessive carbon and that caused my failures?

The gun is fairly new. About 2000 rds total through it. And I have been running this load through it the entire time with no issues till new.



One other thing I noticed. It was still cold(snow outside cold) when I developed these loads. The shoot was about 90 deg and I noticed the pistol was a lot snappier on recoil and my p.o.a was lower than normal..6"to 10" lower. So my assumption is the powder was dramatically effected by the heat and causing higher pressures and increased velocity..... and it was running much dirtier than previous loads.

Glock woes


The gun ran fine all day till the fourth and final stage. Upon disassembly at home I noticed the gun was incredibly dirty.



I'd say you anwsered your own question; Contrary to popular legend, Glocks do occasionaly need cleaning; indeed, even AK's benefit from one.

A professional maintains his equipment first. I own an AK, and have owned Glocks before, but that does not excuse me from maintaining them. It merely extends the time/# of rounds fired until failure if I don't.

 

[Garrobo]

Reset your

sizing die.

 

[Salmoneye]

Just as an aside, Bullseye doesn't need mag primers...

 

[Rule3]

Somewhere around 4 grs?

I guess we "assume" it's a 9mm??

Why Mag primers?

What is your COL?

Glock 9mm is fairly well supported not like the 40SW

Not enough info to even guess what the issue is

I doubt it is the "Glocks" fault." How often is is cleaned?

 

[gahunter12]

As others said check to make sure you are resizing fully, make sure the bullets are not touching the lands, and verify all rounds with a case gauge. I have never had a failure with my Glocks at all.

 

[Drail]

deleted

 

[ETXhiker]

Lots of good advice. But since it happened near the end of the match and the Bullseye load was pretty light, I'm guessing the gun just gunked up with powder residue. I had that happen before with light factory loads that shot dirty.

 

[gto.kroh]

Glock woes


The gun ran fine all day till the fourth and final stage. Upon disassembly at home I noticed the gun was incredibly dirty.



I'd say you anwsered your own question; Contrary to popular legend, Glocks do occasionaly need cleaning; indeed, even AK's benefit from one.

A professional maintains his equipment first. I own an AK, and have owned Glocks before, but that does not excuse me from maintaining them. It merely extends the time/# of rounds fired until failure if I don't.

That's the thing. The gun was clean when I started. Lots of good info in here now though. Thanks guys!!