The Glock can fire out of battery along with S&W, Colt, Beretta and other produced designs. They’ll all fire slightly out of battery.

As for case support I’ll exclude the 40 S&W because I have no experience with that cartridge or pistols chambered for that round. The Glock (G17 & G19 in my collection) pistols chambered in 9mm Luger are considered to be fully supported. Examining a Browning HP, S&W 39, and S&W 659 the 9mm case is no better supported in these pistols than the Glocks. As for the 45ACP I only have a Glock G21 the case appears to have the same amount of unsupported area as certain 1911 pistols in my collection. The Barsto barrel that I utilize in the G21 has significantly less unsupported area than the Glock OEM barrel and several example 1911 barrels from respected manufactures.

As for the polygon rifling system employed by the Glock the rifling is basically problematic / dangerous with lead bullets in general. Some people do use lead bullets but at their own peril. It is not recommended by Glock. Why is the polygon rifling system employed by Glock why not? The criterion of the pistol original design is a military application with military specification FMJ ammunition.

As for 9mm Luger and 45ACP cases fired in the Glock OEM barrels the only thing one notices is that the firing pin strike indentation is different. I’ve experienced no case problems what so ever or interchange ability between pistols of different manufacture in regards to chambering and case life longevity during the reloading process for the 9mm Luger and 45 ACP.

As for design attributes witness S&W Sigma, S&W 99 collaboration with Walther, and the current MP pistol all designed to displace the Glock.

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As for 9mm Luger and 45ACP cases fired in the Glock OEM barrels the only thing one notices is that the firing pin strike indentation is different. I’ve experienced no case problems what so ever or interchange ability between pistols of different manufacture in regards to chambering and case life longevity during the reloading process for the 9mm Luger and 45 ACP.

I concur with this statement as well. I have cleaned up brass that I know was fired in All calibers of Glock pistols, including the 40 S&W. I have reloaded them and shot them again in Glocks with no problems. Again, knowing the propensity of the design I work with it.

Don't anyone fall off of their seats but not all hand loads have to be hotter than factory ammo!

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The Glock can fire out of battery along with S&W, Colt, Beretta and other produced designs. They’ll all fire slightly out of battery.

And we know this is a fact Dennis? I just happened to have tested (for lack of a better word) a PT111 and a Colt Commander to see if what you said is true. I used a block of 4"x4" to slightly move the slide back out of battery. It's easy to visually see when the slide isn't flush any more. With a primed case in the chamber, the PT111 would pop the primer, but the Colt only let the hammer down without popping the primer.

That's why I got rid of my striker fired guns, but still have 1911s.

Sgt Preston back again. Obviously several of you guys have had good luck with Glock fired brass. I didn't get rid of my Glock because of "fear of kabooms". My issues were twofold. Issue #1 was that I couldn't get used to the Glock's "mile long trigger stroke". I learned to shoot on an M1 Garand and we were taught to shoot using the BRASSO system: Breathe, Relax, Aim, SLACK, Squeeze, & observe the other steps. I was used to a "2 stage trigger" where your finger took up the slack until you got to the "wall" & then you applied pressure until the round went off. The Glocks that I have shot have a long throw straight pull trigger that I couldn't adjust to. This was a personal failure on my part. The Glock 34 that I owned was flawless, every round fed, chambered, fired, & ejected properly. The gun was also easy to clean & care for, BUT I simply couldn't shoot it well. After about 6 months with the Glock, I was also spending a lot of cash on factory ammo & I decided to look into the possibility of reloading. The Glock owners manual said "No Reloads". I wondered why & ask a gunsmith. He mentioned "Kabooms". I google "Glock Kaboom" & read a lot. I don't jump into things quickly & I read everything I could on reloading for a month or two to try to learn as much as I could before I bought a lot of the "wrong stuff". During this time I sought out some fellow shooters who reloaded. I was able to spend a day loading with a co-worker on his Lee Pro 1000 Progressive & his Lee Turret Press. I was able to spend another day with another friend loading on his Dillon 650 & 1050. About that point I decided to sell the Glock & buy a revolver & to really work on my basic shooting skills. Immediately the revolver & I got along famously & I bought a Dillon 550 to reload on. I have shot Glocks since becoming a better shooter, but still don't shoot them well. But I do respect the pistol. That's the end of my Glock story. Sgt Preston USMC LLA