Just received about 300-400 pieces of brass from a friend (free). I checked the head stamp and it seems about evenly split between three head stamps. The stamps are FC, WW and R-P. All the brass appears to be in excellent condition, some are older looking, such as the R-P and FC but yet in excellent shape. I've got about half in the tumbler now and will take a better look in a couple of hours. All the brass had the primer removed. Does anyone know what else I should look for?