Glock 27 not glocking brass


March 31, 2010, 11:21 PM
I'm not complaining,:)
I decided to take a stab at reloading .40 caliber rounds and was surprised that the bulge from my glock fired brass was almost undetectable without close inspection. This is far less dramatic than what some posted images show. I used a lee carbide resizing die and checked all cases with guage. Every one slide in and out without hesitation. The brass that was fired through the glock did take only a little more pressure on the down stroke but this was barely noticable. I was expecting to use a disassembled crimp die to get rid of the bulge but the brass came out in great shape. Is this something that varies in models and is there any reason to deglock on brass with a minor bulge?

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April 1, 2010, 12:21 AM
firstater, my Gen3 G27 has tighter chamber and better support at the ramp area than older Glocks.

Glock has improved chamber/ramp area support in their barrels over the years, but has not officially come out and announced it. In general, Gen3 models have better support than Gen1 and Gen2. If you have looser/less supported Glock model, you can either buy a new factory Glock barrel (around $150) or buy an aftermarket match barrel with even tighter chamber/better supported ramp area like Lone Wolf (around $100). LW also make drop in 40-9 conversion barrels so you can shoot 9mm out of your G22/G23/G27/G24.

Also, not pushing your reload charges to max will also minimize the case bulge.

Enjoy your G27!

April 1, 2010, 05:29 AM
What bds said:cool: I loaded for my G23 with no bulging brass, was a few years ago, so the tighter chambers have been around awhile.

April 1, 2010, 06:25 AM
The problem I have is not with my own brass... but with brass that I've purchased once fired.
I got several thousand once fired 357 SIG brass from a police dept(kin folks), they were not fired in Glocks but still have a slight bulge. I don't know for sure what brand pistols they have but will ask next time I talk to him.
Anyway the bulge is so slight that it is hard to see until I run the brass thru the RCBS sizer die, it leaves a 1/3 round ring about the thickness of a thin dime or less. Yes I know my die is not making it all the way down like it should, but because I use the Forster CoAx with the adjustable jaws there is no way to grind off the shell holder. So I just run them all thru the G-Rx die first .... it sizes the base and most of the rest of the case except the shoulder-neck area which is taken care of with the RCBS sizer.

Jimmy K

April 1, 2010, 10:32 AM
I have both Glock 23 and Glock 27 that are both Gen 3's. I only shoot my reloads in both and have no issues with "Glocked Brass". A lot of my cases now have 6 - 8 reloads on them and have no signs of failure. I load 4.7 grains of Unique behind 180 grain lead bullet. My old Gen 1 Glock 22 was a different story, but she's gone on to another owner now.

April 1, 2010, 11:27 AM
I have a 23 that I guess you would have to call a GEN 1.
Anyway, I bought it new in early 1995, about 4 1/2 years after the Model 23 was introduced.

It has a very loose & sloppy chamber.
But has never shown any indication of "Glocking" brass.

But then, all I have ever shot in the stock factory barrel is 180 grain FMJ to get empty brass, and my own reloads using both lead & jacketed bullets.

The secret to Non-Glocked brass is, don't try to make a 10mm out of a .40 S&W.


April 1, 2010, 04:51 PM
I've never had issues with "Glocked" brass. One time I decided to exceed book max loads slowly, to see if a "guppy belly" occured at some given % overcharge. Worked my way up to 10% over book max with Power Pistol, then decided to stop there because I just didn't want to put more than 10% over max in. No distinct bulge whatsoever, and 10% over book was actually making the primers only look the same as factory ammo that used the same brand of primer (CCI). Right at the book max, there was no rectangular outline around the firing pin dent at all.

I'm guessing that the bulge pretty much only happens when ammo is out-of-spec and/or fired out of battery (especially considering that the Glock chamber leaves a maxiumum of 0.05" of brass unsupported, and all the pictures online show bulges far larger than that). Any gun is dangerous if it can fire out of battery.

GW Staar
April 1, 2010, 06:38 PM
I have nothing against the late runs of Glocks except that I don't grip them too well since I have small hands.

The company quietly fixed their perfect gun line. Well geeze, if you have perfect guns, you can't improve them.;)

I'm may break down and get a .40 cal or .45 cal Glock yet...a local gunsmith with a good rep says he can make the grips smaller. We will see...he's supposed to show me an example tomorrow. Genetics don't play fair. My Kahr CW 40 fits me perfectly, but I don't trust it. For one thing it won't feed Speer Gold Dots worth sh... you know.

April 1, 2010, 07:09 PM
a local gunsmith with a good rep says he can make the grips smaller. We will see...he's supposed to show me an example tomorrow.

There are many companies that do different versions of Glock grip reduction - most involve removing and melding the back strap hump, but some go to more extremes of removing the front strap material also.

April 1, 2010, 11:53 PM
The amount of Glock bulge also depends on the brand of brass. My early G27 bulges Federal Tactical ammo enough to be scary but Remington Golden Sabers and Winchester white box only show a slight bulge.

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