need case headstamp id
was digging thru my one-of and odd cartridge tub ( looks like a margerine tub with lots of odds n ends in it ). pulled one out that looked very 308-ish to me.
caliper says projectile is .308 right where it enters the case neck
quick check on a lyman case gauge says it is 308 . compairing it to an empty i have.. i'd have to agree on it being 308...looking at the rear it has a sealed and crimped primer.. so me thinking 762x51
seal is green.. and the crimp is 3 small almost imperceptable divots equi spaced around the primer. headstamp looks like