For my 7mm-08, I started with 50 Winchester cases. Some have been fired once, the others twice. This is still what I use. About two years ago, I was given some brass by a couple of different co-workers. There are 32 rounds of fired R-P 7mm-08 brass and 50+ rounds of .308 brass, some with a "F C" head stamp (Federal?); the others have a "C B C" headstamp (from Brazil, I think).
I'm an accuracy nut and mostly punch paper. But, how or when would I use the other brass? I understand the .308 stuff has to be necked down. What I'm really asking here is how do you go/mix/whatever from one brand to another? With regards to hand loads, accuracy, and different brass; seems like one has to start back at square one?