357 Brass Appearance Question

What you see happens when base diameter of the case is at minimum diameter and expands more to contact the chamber walls.

Below the same thing happened to the .303 British case on the right. Both cases were fired in the same Enfield rifle and the HXP case is just smaller in base diameter.

eM3H3ls.jpg


Below the base diameter of the case manufacturing tolerances are .379 to .373 in diameter. And the cylinder can vary .004 in diameter from .3809 to .3849

357chamber.jpg
 
Almost appears to look like the beginning of a case head separation.
I’ve only seen it on my 308 ,and had one happen.

I wonder what would be the outcome of a Casehead separation in a revolver?Is it even possible?
 
Looks normal to me.
case separation in a revolver is possible. Had it happen with 44 mag loads twice. I noticed a line on some other cases of that batch. I just chucked those 50 out. Looks completely different when you see it. Cases in pictures are expanded without a bright line, just expanded. At or near max loads will do this.
 
So, nothing to worry about? I won't be loading these for max, anyway. I'm going to use these for SWC lead. Perhaps I should buy some Starline for reloading to max...
 
They should be fine for reloading. It's a little like the Glock bulge on 9mm or 40. Bigedp51 illustrated it really well above.

Might not expect 20 reloads at max capacity but for middle of the road cast I'm sure they will last quite a while.
 
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