Is there something about the 300 RUM that makes it eat primer pockets (higher pressure, headspace?)?
A couple weeks ago all my regular sources of brass had run out of 300 RUM, - I back ordered (and just received) 500 of the 300 RUM brass.
You can prevent neck splits by annealing, but annealing the web would be disasterous (and make things worse if you didn't get a head seperation).
Can anything be done (aside from avoiding hot loads) to extend the life of 300 RUM brass?
>>how may would a guy have to buy to end up with 100 good fairly concentric cases ??
I'll be sorting mine by weight, neck thickness & runnout (after resizing). Hopefully I'll have groups that are consistent and 200 or so for plinking brass.