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Old 03-02-2008, 13:06   #295
reloading nut
shotgunred's Avatar
Join Date: Mar 2008
Location: N W Washington
Posts: 7,725
Originally Posted by ;3015202
My own experience with a G22 and my early .40 reloads - I was loading 180 FMJ over AA5 powder (I forget the charge weight now). My wife was shooting my G22, and out of the corner of my eye I saw a flash larger than normal, not coming from the muzzle, but from the middle of the pistol, right behind the breech area.

Chamber area had cracks on both sides with the case head blown out at the 6:00 (the dreaded unsupported area) and no primer in the case. Did not get the 'classic' barrel peel, though ;f

I have long since changed my reloading habits and no longer use 180gr bullets or that fast a powder in 40. I still carry that same G22 (obviously fixed since then), and have shot many hundreds, if not thousands of my reloads through it (with an aftermarket barrel) and my G35 with factory barrel. Not as many of my reloads thru a G27 & G23 with factory barrels with no ill effects.

I firmly believe, but have no real desire to test that belief, that even with a "fully supported chamber", the same thing would have happened, though maybe not the blow-out at 6.
I have had two events with my glock 23. Both of them involving aa#5.
I bough my 23 when they first came out. I preordered it before they were available. At the time AA#5 was the recommended powder for reloading. I now have two cases of the stuff on a shelf. It may have its uses but I wouldn’t use it for my glock ever again.

First time damaged the barrel. I found a small crack on were the chamber meets the barrel.
Second time the side of the bullet case (unsupported spot) blew out and took the ejector with it.
I don’t believe that either time was the guns fault. I think it is an issue of AA#5 burning too fast with 180 grains of lead and the pressures that causes.
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