[quote=halfbakedi420;3600582]
Originally Posted by
bigcountry
Bottom line is, you have an unsupported part of the case. Thats means, load at your own risk. i load starting loads with my G21 and use +P starline brass. For months, I took notes with a micrometer measuring any expansion. I am sure I could go more.
But I decided to nip it in the bud and just get a bar sto bar match barrel. That way I can shoot until the brass cracks if I want.[/QUOTE
well thats what happened when it exploded in my hand, the brass had cracked and i had to pull it out with needle nose pliers. to me that was too late. so whats the most, rule of thumb if u will, ya want to use the brass?
For instance with my 9mm 92FS or my 1911 colt, I will shoot brass until it cracks at the neck. They have fully supported chambers. I know that if brass gets weak at the rim, its going to hit chamber walls first. But with glock, there is a 2-3mm portion that it has no wall to hit, and only can blow out.
But my 40S&W glock, or 45ACP glock, I will not go that far. I will segargate brass by firings and keep close taps with a mics the width at the rim. If I see any hint of bulge, they get tossed.
Honestly, I never was aware of glock KB's 5-7 years ago. I shot full tilt 357sig and 40S&W loads in my glocks with range brass I picked up. I never had an issue, but looking back I feel lucky. Some of my loads were hot. As you found, it only takes one weak piece and you can ruin your hand, you mag, and your frame.