I'm not a Glock lover persay, since I still like to poke the true kool-aid drinkers with a sharp stick just to see them raise their hackles and defend their one true saint Gaston. That said, I have two Glocks I shoot the snot out of, only 20K rounds through one, but give me time, it is only 15 months old. I compete with them and trust them for carry.
All guns break. I was at the range last week and cleared one of the shop's G-19 rentals for some retard that couldn't seem to clear it without putting his hand on the muzzle. The shop let me look since I seem to be the default Glock expert, a title I never thought I'd claim. My first clue something was up was that the barrel would not unlock from the slide until I pushed down on the hood with my thumb. I thought broken locking block as soon as that happened. Well, I got the chamber clear which turned out to be an empty case. I pointed the gun at the floor, pulled the trigger and the slide promptly fell off the gun. Hmmm. The locking block was fine, so fine in fact that it was retaining the entire lower locking lug of the barrel. Pics to come when I get them developed.
Another data point. I fired a mag of various factory 10mm through one of the shop employee's G20. After firing I picked up the brass and noticed that the brass from the 3 Hornady XTPs that had been fired were badly bulged at the 6 o' clock position of the web. Hmmm again. Fired the same ammo through his Smith 10mm(10mm freak) and the brass looked virgin. Pics when I get them.
I try not to jump on the "unsupported chamber" bandwagon when I think back to a pic Tamara posted on TFL with a Glock barrel lined up next to several other autoloader barrels. Truth is many other models are throated as much as a Glock.
Some theories I cannot support without a highspeed camera and other cool gadgets. I believe that some Kb! Glocks unlock early, as in before the bullet leaves the bore. Glocks are somewhat unique in that they operate on a spring balance, that being the closing force of the recoil spring at extension must overcome the trigger return and striker springs. Case in point. I had a light recoil spring in my G34 with a heavy trigger return spring and standard striker. This gave me a smooth cycling gun with a light trigger for IPSC. I had several malfunctions where when I seated a reload mag with one in the pipe the jar of seating the mag would help the striker pull the gun out of battery. The barrel hood would be dropped down to the unlock point. This confounded me until I sat down and tried to replicate it. I thought it was a trigger freeze, which made no sense as my trigger finger leaves to run the mag release. I think it may be possible that some guns slightly unlock due to a similar situation with a bullet still in the bore, leading to blown and bulged cases. Dunno, just a theory.
Another, relating back to the 10mm tale. Is it possible that the Glock rifling seal up differently than conventional, yielding a different pressure curve to the powder ignition? I could see that happening, the bullet obturates quicker, better gas seal. What is the leade of the rifling as compared to conventional? Folks throw Bar-stos and KKMs at a Glock to get a "fully supported chamber" which is nigh impossible in an autoshucker; could they be inadvertantly fixing the problem by getting the conventional rifling?
The third theory which is somewhat proven by Darwin, P.T. Barnum et. al. People are freakin idiots. The two biggest Glock purchasers are total neophytes and very experienced handgunners that recognize reliability is a good thing.
The tyros blow #### up because they don't know any better. Case in point, the guy I tapped on the shoulder who was shooting factory lead reloads from a G21. I said "Excuse me, it's really none of my business but you are about to blow yer face off." I proceeded to explain the whole lead+Glock bad thing and showed him one of his badly bulged cases. He then allowed as to maybe that was why his first G21 blew up and Glock was nice enough to replace for 150 bucks.
:banghead: :banghead: :banghead:
The experienced guys blow stuff up because they do know better. They know they can change this, that, cram so much powder in the case, etc. Occasionally that goes all wrong.
The last is fact. Glocks like other guns have problems and the factory would do well to call a recall a recall and get to the root of the problem. Still great guns, gonna carry one today when I head out, just don't drink the kool-aid.