Was reloading some .308 brass that I thought was all stamped "308 Win FC". Ran across a few with "FC 71". I am normally pretty good with brass management, so not sure how they got into the mix. In any case, I read that "FC 71" is Lake City and have heard that it's comparable to FGMM and may be made in the same factory. Anyone know? If so, can I mix the headstamps and assume the same performance or should I separate?