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Old 03-29-2012, 14:47   #364
hunter 111
Senior Member
Join Date: Jan 2012
Location: TRAVEL -
Posts: 2,170
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.

As I got to her and checked her for damage (none!), I saw that the mag & backstrap plug had been ejected, slide stop sheared off and the slide was locked up tight (had to bang it against an I beam to break it loose!).

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 believe what happened was bullet set-back creating a pressure spike. At first, I though kB (actually, more like OC ;f ), but gradually moved away from that explanation and have settled on set-back.

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.
things I have noticed through the years most K BOOMS are 40 cal

least amount of K BOOMS 9mm
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