Anyone have trouble with oal in glock chambers. I reload 115 ball and it chambers perfectly in my Sig and S&W , but every now and then I get one that won't go completely into battery in the glock . This is a 19 by the way ,and it never has a problem with factory ammo. I am at work and can't remember the oal offhand .
Glock chambers
- Thread starter mtnbkr1
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LiveLife
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9mm Glock barrels have longer leade with gradual rounded start of rifling that will accommodate longer than SAAMI max of 1.169".
While I usually load 115 gr FMJ/RN shorter to 1.135" for increased neck tension, I will load longer up to 1.160" when using fluffy/powder charges to prevent powder compression or near max load data to reduce gas leakage.
What taper crimp are you using?
While I usually load 115 gr FMJ/RN shorter to 1.135" for increased neck tension, I will load longer up to 1.160" when using fluffy/powder charges to prevent powder compression or near max load data to reduce gas leakage.
What taper crimp are you using?
I can't remember. I apologize, but I load a lot a once ,and may not load any for a few months, just depends on how much free time I have to shoot. I am presently at work or I would go look. I do know that the rounds that give me problems, drop right in the Sig and S&W barrels, and rotate in them freely. I am pretty sure it's not the crimp. Like you stated , I have always heard that Glocks have slightly larger chambers, which is why this puzzled me. I wonder if I just happened to get a G19 with a slightly shorter than normal leade.
rcmodel
Member in memoriam
Take the barrel out of your gun and use it as a chamber gage after you load them.
Something going on besides 115 RN length in a Glock chamber though.
Taper crimp should be set to measure no more then .376" at the case mouth on loaded rounds.
Check that with your favorite instrument of measure first.
( But a dial or digital caliper, or micrometer would be better.)
rc
Something going on besides 115 RN length in a Glock chamber though.
Taper crimp should be set to measure no more then .376" at the case mouth on loaded rounds.
Check that with your favorite instrument of measure first.
( But a dial or digital caliper, or micrometer would be better.)
rc
Yes to the barrel idea . I have a hard time getting the slide back when this happens, and it's getting frustrating to be honest. I plan to try many by plunking them in this barrel before I go on about the business of mass loading. I will get out the Mitutoyo calipers and get back with you fellas. Thanks for the ideas.
armarsh
Member
While you can get the issue resolved by measuring or using your barrel as a gage, it is super convenient to just drop a round in the chamber checker you have sitting by the press.
http://www.midwayusa.com/product/74...dge-gage-9mm-luger-38-super-40-s-and-w-45-acp
http://www.midwayusa.com/product/74...dge-gage-9mm-luger-38-super-40-s-and-w-45-acp
update
Update on this. I plunk tested around three hundred rounds that I had loaded. Out of these , I had around 25-30 that wouldn't pass in the Glock. Crimp was good, overall length was good. I noticed that some of the rounds that were no go , actually stuck out of the chamber a good bit. Turns out , it's the 1/3 of the case , closest to the rim, it's nearly ten thousandths over in a few. This brass is not new, but loads are low pressure practice rounds . I run all through the same re-sizer. I really don't get what's going on at this point. All but two fit the S&W barrel .
Update on this. I plunk tested around three hundred rounds that I had loaded. Out of these , I had around 25-30 that wouldn't pass in the Glock. Crimp was good, overall length was good. I noticed that some of the rounds that were no go , actually stuck out of the chamber a good bit. Turns out , it's the 1/3 of the case , closest to the rim, it's nearly ten thousandths over in a few. This brass is not new, but loads are low pressure practice rounds . I run all through the same re-sizer. I really don't get what's going on at this point. All but two fit the S&W barrel .
Are all the cases the same headstamp?
Not only do you need to do the plunk test, you also need to find the measurement to the rifling. Bullet lengths vary per box as does the bearing surface of the bullets. So you should account for the fudge factor or variants of .005 or more. I've seen bearing surfaces of bullets vary more than .015 per 100 count box. My buddy's G-17c plunk tested good with a dummy round and the first 20 or so rounds. Before 50 rounds he had to seat the bullets another .007 deeper, it happens.
My G-34 chamber will allow me to load longer than recommend lengths. I don't use OAL measurements. I use case to ogive measurements. Bullet profiles are very different for the 7 different bullets I shoot in my Glock. But the measurement to the lands, vary little.
My G-34 chamber will allow me to load longer than recommend lengths. I don't use OAL measurements. I use case to ogive measurements. Bullet profiles are very different for the 7 different bullets I shoot in my Glock. But the measurement to the lands, vary little.
No, the cases aren't all the same headstamp, but quite a few are PMC ,which I've never had problems with before. RAT I agree with what you suggest, but I am now convinced that the problem is at the other end of the loaded round. I am just not sure what is causing it.
mstreddy
Member
Is this a factory Glock barrel or aftermarket?
Was this brass fired by you in that Glock, or in another pistol? Is it range brass?
Every chamber is different and brass fired in a looser chamber will expand more than a tight chamber.
If they are too wide closer to the case head, then you're not sizing enough. And in this very rare case your Glock chamber is tighter than the Sig and S&W's.
I'v had the same issue but only with my Lone Wolf barrel in my G17 and not quite as much with my G19.
I had to adjust my sizing die down further to ensure the brass is getting resized further down the case. Even then I have an occasional piece that will be tight in the G17 Lone Wolf barrel.
I use the Lone Wolf barrel as my plunk test for EVERY 9mm round I load.
Was this brass fired by you in that Glock, or in another pistol? Is it range brass?
Every chamber is different and brass fired in a looser chamber will expand more than a tight chamber.
If they are too wide closer to the case head, then you're not sizing enough. And in this very rare case your Glock chamber is tighter than the Sig and S&W's.
I'v had the same issue but only with my Lone Wolf barrel in my G17 and not quite as much with my G19.
I had to adjust my sizing die down further to ensure the brass is getting resized further down the case. Even then I have an occasional piece that will be tight in the G17 Lone Wolf barrel.
I use the Lone Wolf barrel as my plunk test for EVERY 9mm round I load.
Wreck-n-Crew
Member
I'm with mstreddy, if its sticking near the base your not sizing down far enough.
Use a dry erase marker and mark the brass on both ends, drop it in the barrel and spin it. When it comes out you can see where the problem is.
Sent from my LGLS991 using Tapatalk
Use a dry erase marker and mark the brass on both ends, drop it in the barrel and spin it. When it comes out you can see where the problem is.
Sent from my LGLS991 using Tapatalk
LiveLife
Member
You should always full length resize semi-auto pistol cases.mstreddy said:
Resizing die should be adjusted so the bottom barely kisses the top of shell holder/plate.
If you see daylight between the die and shell holder/plate, die needs to be adjusted down.
sizing
Thanks for the replies all . I will go back and double check, but I am almost certain that this is the way my sizer is set up. I even swapped from a Dillon sizer to an rcbs because I had a few cases that didn't have enough neck tension to hold the bullet, even with the Dillon die as low as possible. This is a stock G19 barrel, these are rounds that I fired. I have so much brass, that I am not sure if it's range brass or not. I will keep trying until I figure this one out. I just can't understand why a piece of brass that is oversize from firing, and then run through a properly set up sizing die, isn't the correct dimensions when done.
Thanks for the replies all . I will go back and double check, but I am almost certain that this is the way my sizer is set up. I even swapped from a Dillon sizer to an rcbs because I had a few cases that didn't have enough neck tension to hold the bullet, even with the Dillon die as low as possible. This is a stock G19 barrel, these are rounds that I fired. I have so much brass, that I am not sure if it's range brass or not. I will keep trying until I figure this one out. I just can't understand why a piece of brass that is oversize from firing, and then run through a properly set up sizing die, isn't the correct dimensions when done.
LiveLife
Member
Pull some of 25-30 rounds that would not pass the Glock chamber and resize the brass. If they all fall in the chamber freely, then it was not resizing that prevented them from fully chambering and I would next look at flare/bullet seating/taper crimp.mtnbkr1 said:
With various 115 gr FMJ bullets, it's been my experience that OAL up to 1.160" and taper crimp up to .378" will freely fall in the chambers of many factory/aftermarket barrels without hitting the start of rifling (I actually use .377" taper crimp with .355" FMJ).
Not sure if I could blame Dillon sizing die for lack of neck tension. Keep in mind that many reloaders and match shooters have successfully used Dillon and RCBS dies to reload 9mm with various 115 gr FMJ over the decades.
I use Dillon/Lee/RCBS dies to reload my pistol loads and if my rounds fail to fully chamber in any barrel, I would not suspect my dies.Perhaps you are flaring too much which would explain loss of neck tension. I flare the case mouth just enough to set the bullet on the case mouth. If you were using too much flare, try reducing the amount of flare and see if your neck tension issue continues.
Not likely. While Glock has improved the chamber size of 40S&W with improved case base support at chamber mouth over the generations (Gen 1/2 to Gen 3/4), AFAIK, 9mm Glock chambers have remained the same with same length of leade over the decades.
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