whats the deal with Glocks chamber? reloading for g34 gen4

vince514

vince514

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Hey guys

I have a glock 34 mos gen4, i started reloading two months ago. I started with .45 acp(1911) reloaded a good 500 + ammo without hickups..

Now i was attempting to reload my first batch of 9x19 for my g34g4...

Im having problems with gun chambering the round fully into battery??

IMO my ammo is not out of spec.

Here's my recipe :

9x19 brass winchester
Small pistol primers
Hodgdon CFE pistol powder 5.2 gr
x-metal bullets 125 gr RN coated
C.O.L 1.150 (taken from hodgdon website for 125 grainers)

at least 50% of my ammo doesnt sit flush into the barrel when i drop it. I did another test with some tipton dummy rounds and the difference is obvious.

there's something wrong. I did crimped my bullets also.

Advices please.. I heard about the unsupported chamber thing i would appreciate some teaching on these. Do i need another 9 to shoot these bullets?

Thank you
 
Three things come to mind that might cause that. Either your bullets aren't seated deep enough or your cases need to be sized deeper towards the case head or the bullet's diameter or possibly thicker walled cases might make the overall width just a hair on the far end of the tolerance scale.

Take a handful of full sized empty cases and drop it into the chamber one after the other. Do they all seat flush and fall out when the barrel is inverted? If so, then your problem might be the seating depth of your bullets or width of your ammo. If the empty cases get caught up and don't sit flush, then you have a case sizing problem.

If your problem is bullet seating depth related, make up a dummy around and seat the bullet a couple thou at a time and keep dropping it into the chamber until it seats cleanly and falls out wen the barrel is inverted. Different brands of bullets have different OGIVE profiles which is why brand X bullets may need to be seated deeper than brand Y.

If your problem is case sizing or diameter related, just add a Lee carbide Factory Crimping Die as the final stage of your production. I''ve had this problem with my RCBS dies which does kiss my shell plate but just doesn't get that last couple thou just before the case head. After adding the Lee FC die, I've never had ammo feeding issues. Worked so well, I've added one to my 45ACP production as well.

Keep in mind non-rimmed cases seat on the case mouth and you don't want to be adding a roll crimp or a whole lot of it to begin with.
 
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When bullets fail to feed it is almost always because they are not sized properly. I would double check that your sizing die is set properly. When you raise your press you should screw it down so it touches your base plate/holder then back it out about 1/8 of a turn and secure it.

Non-fully supported chambers have a bit of the casing exposed above the feed ramp where it is not "fully supported". If this space is large enough the casing will bulge when under pressure from firing and not reset itself until it is resized. Glocks, especially older ones, are notorious for this.

If you have your dies set properly and are still not sizing out the buldge it is because your die is not designed to do so. At that point I would recommend a Lee Under size or "U-Die". It will size it a little longer down the case than most other sizing dies. They can usually be found for around $20-$50 each.
 
DWiB said:
When bullets fail to feed it is almost always because they are not sized properly. I would double check that your sizing die is set properly. When you raise your press you should screw it down so it touches your base plate/holder then back it out about 1/8 of a turn and secure it.

Non-fully supported chambers have a bit of the casing exposed above the feed ramp where it is not "fully supported". If this space is large enough the casing will bulge when under pressure from firing and not reset itself until it is resized. Glocks, especially older ones, are notorious for this.

If you have your dies set properly and are still not sizing out the buldge it is because your die is not designed to do so. At that point I would recommend a Lee Under size or "U-Die". It will size it a little longer down the case than most other sizing dies. They can usually be found for around $20-$50 each.
Click to expand...


Sounds like a solution.

I have a Lee single stage press with lee 9mm dies.

I have used a decapping/resizing die and huh IMO the press/die what ajusted right i was going all the way down until the old primer pops out full range of motion on the lever.
 
DWiB said:
When bullets fail to feed it is almost always because they are not sized properly. I would double check that your sizing die is set properly. When you raise your press you should screw it down so it touches your base plate/holder then back it out about 1/8 of a turn and secure it.
Click to expand...

Uhmm, I think you meant, once the sizing due kisses the shell plate, lower the ram and tighten the die another 1/8 to 1/4 turn. You don't want to introduce a gap under load, hence you don't back it off 1/8 turn.

vince514 said:
Sounds like a solution.

I have a Lee single stage press with lee 9mm dies.

I have used a decapping/resizing die and huh IMO the press/die what ajusted right i was going all the way down until the old primer pops out full range of motion on the lever.
Click to expand...

With a case in the shell holder and the sizing die installed, raise the ram all the way up. Now have a peek at eye level to see if you can see daylight between the shell plate and the bottom of the sizing die. If yes, lower the ram and tighten the die 1/8 turn and repeat until there is no more daylight.

If you are already kissing the die, see my solution above.
 
Continue to adjust your bullet seating depth by turning the bullet seat adjustment on the seating die clockwise. Go in small increments (like said above) until the cartridge drops into the chamber and can be rotated without resistance and drops free with ease. This will ensure that the bullet is not in contact with the lands and the case mouth is set against the chamber end. Measure this overall length and record it for use when using the x-metal bullets. Each bullet manufacturer has a different profile, so bullet seating depth will vary from different suppliers.

Oh yeah, disassemble your firearm and use your barrel as a chamber checker. Don't load it.

The goal is to have a cartridge that is as long as possible to fit in the magazine and aid with chambering, but short enough to chamber completely.

If you are using a Lee Factory Crimp Die, you can back the crimp off (or remove the stem) and use it as a die to post size your cartridge if you wish. For the loaded rounds you have already made, the crimp can't be "removed" but you should still be able to push the bullet deeper (depending on how deep the roll crimp was).

Depending on the type of die used for bullet seating, it may already have a taper crimp. I know that the Lee bullet seating dies have a taper crimp which is all you need for straight walled pistol cartridges for semi-auto. Hope this helps.
 
I had this issue as well.
Your resizing / decapping die needs to touch the shell plate / shell holder to properly full length resize the brass.
 
vince514 said:
Sounds like a solution.

I have a Lee single stage press with lee 9mm dies.

I have used a decapping/resizing die and huh IMO the press/die what ajusted right i was going all the way down until the old primer pops out full range of motion on the lever.
Click to expand...

Lee dies and Lee Undersized sizing dies are two different things. In my opinion, the Lee U-Die is the best sizing die for 9MM*

*Disclaimer* I do not use them for all bullets. I have found Berrys 147's are slightly larger in diameter and because they are being married to a undersized case they do not seat as well (lots of bulging). For this I go back to my Hornady.
 
thanks everyone for trying to help.

Found something.. : All my reprimed/resized 9mm drops free into my g34 barrel.

Another thing i noticed. X-Metal coated bullets leave some coating debris around the top of the case mouth right next to the bullet.

Looks like the problem is here.... i made some dummy rounds with these bullets and the g34 can chamber it with the help of the slide while racking.. but scratch/scrape the bullet while ejecting.. need to rack the slide using some force.

Anyone here have any experience with x-metal cerakoted bullets?
 
Wont use Cerakoted bullets. While lots of people use them, I find them to be too smokey for my taste. I would also never consider shooting them indoors. I dont konw if that is your thing or not.
 
DWiB said:
Wont use Cerakoted bullets. While lots of people use them, I find them to be too smokey for my taste. I would also never consider shooting them indoors. I dont konw if that is your thing or not.
Click to expand...

dont really know yet.. first time trying cerakoted bullets.

Had great success with Campro plated bullets .45 acp

might be the last time... for x-metal bullets.
 
If the case is scraping the bullets when you seat it, try a bit more mouth flare. Bell the case more.

Ignore the COAL in the book, unless they borrowed your pistol to do the load development. Take the barrel out and use it as a gauge to find how deep you have to seat the bullet so that it does not touch the rifling. This will be different for each brand and weight of bullet.

My pistol like 1.120"
 
I virtually guarantee you the issue is excessive OAL. The published OAL is an entirely useless number. Every bullet will be different and that will affect how the olive interacts with the rifling. The fact you say it takes force to eject a live round points to a billet jammed into the rifling.

A properly sized and seated round should feed and eject without an extra force required.
 
i shown my ammo to the guy working at my club and he said that the case wasnt flared enough.. seating the bullet at the proper depth made the coating hard to explain.. wasnt that hard to seat the bullet.
After having the bullet seated there was some coating around the case mark and i think it was the problem.

Fired alot of ammo today.. went well. after the first and second shot ive been looking at the primers and the empty cases for any sign of overpressure with the guy. Everything seemed to be allright.

Nexttime ill be more careful with the flare die.. IMO it was correct but from the results looks like it could have been better.

Guy at the counter said Lee dies are ####.
 
that's what i though too.. lee dies are working just fine.

had to blame lee dies because my flare wasnt enough from what he could tell... only reason bullets got shaved a little bit while seating em+plus the crimp gave em a weird look.
asked me if i crimped like hell? i said no. anyway ill be more careful next time im making 500 bullets LOL. they still work very well...
 
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