I had meself, some 100 rounds of handloaded 357s, with 158 grain Hornady XTPs. and 14 grains of 2400, loaded in NEW Nickel flavored R-P brass.
I shot'em up so's I could use the brass, and I don't care much for jacketed bullets in my gun anyway. I had just got the stuff and loaded them for something to do.
THEN, I loaded up 18 test loads with cast bullets, and 5 out of the 18, showed gas leakage around the primers. WHAT??? This is new brass, not a hot load, so what did I do wrong?
Instead of Sheet-canning the brass as BAD, I marked the case heads with a red sharpie pen, cleaned the primer pockets, and reloaded the same 5 brass again with a lightER proven load, I've used before, and on firing them, there was NO SIGN of a problem. SOOO, I loaded the HOTTEST TEST Load in them, again, and STILL, No Problem. (No Gas leakage.)
I dunno what's goin on. When I loaded the rest of the 100 brass, I noticed I had a SPLIT CASE, in the bunch. It was NEW BRASS, having been fired only ONE TIME.
Maybe, I'll just go to the Gun Show, this weekend and forget it ever happened.
Smitty of the North