ButchG17 wrote:If it works when it's unloaded, it should work when it's loaded.....unless there's something wrong with the ammo you're putting in it, or there's something in the chamber that's keeping it from closing....which is what it sounds like it's doing.
What ammo are you using?

I figured out the problem, but I think an armorer will have to fix it.
I have been shooting WWB and mid range hand loads (carefully measured ... bullseye and unique powders .. I find bullseye to be more accurate for target shooting, but graphite covers the end of the gun).
Anyway, as I mention, I brought the gun back to where I purchased it and they didn't see anything wrong (we tried with snap caps and it "fired" fine). I went on over to Bill's and bought a box of Magtech .45ACP FMJ (what crap by the way ... I guess I am noticing that my hand loads are more accurate ... but so is WWB and Federal American Eagle). Still got the failure to fire problem ... safeties didn't engage and trigger pulled through easy. This time I took time to look closely at the gun and noticed that the slide was sitting about 1/8" (max) back from where it should be. I pushed it in with my thumb and it shot the remainder of the rounds flawlessly. I cleaned and oiled it up when I got home ... I don't know what would cause the slide to stick like that [by so small a distance], but hopefully oil will make the difference. I want to avoid over oiling the gun to avoid other problems and, of course, I avoided the trigger. Anyway, about 60 rounds went through it without issue. Sent another 150 rounds through a S&W SW1911PD (tactical with Picatinny rail) and they were spot on! Only catch is my 200gr SWC wouldn't load into the stock magazine. I will try Wilson Combat 47D magazine in that thing next time to see if I can send these rounds through ... sounds like it should work.
So, if I find the fail to fire happening again with my Glock, I know where to look, but I am afraid it might be hard to get a smith to repro the problem. Anyway, until I am confident this won't happen again, I won't be happy with this gun as a self-defense weapon. Hence my other reference.
You could get a new lease on life -- if only you didn't need the first and last month in advance.