I got a box of mixed 45 Auto brass yesterday and have been sorting them into SP, LP, and unfamiliar headstamps. I have seen some AMMO INC and some A USA cases and have never had much experience with either headstamp. Are they good cases? Should I just throw them in the pile with Winchester, Federal, Speers, and a few others or should I put them in the S&B pile to be used when there is a good chance I will lose them. I have not found any AMERC and will toss them if I do.