I just had a conversation with a very well-respected manufacturer of custom rifles who just finished a 350 legend project for a client (semi-auto)--he gave me head's up to watch out for the headspace specs which apparently (if I understood him correctly), following winchester's specs, have a max beyond what one would normally would expect to find in an AR. I'm starting to get concerned, I'm already baffled by the seeming lack of standards in the chamber and bore reamer dimensions--getting the "224 valkyrie deja vue all over again feeling."
