Hello Just started loading for the 300 Win Mag. This is my first belted mag. I’ve fire formed 25 pieces of Nosler brass. It took 3 firings to reach the chamber shoulder. I FL resized pushing the shoulder back 0.002”. I’m on my 5th firing now. How many firings do you get before you anneal? About how many firings are you getting out of your 300 win brass? I haven’t had to trim much at all, in fact some of them are just now getting to trim length.
I usually don’t get rid of my 308 brass until the primer pockets get pretty loose. Do you use the same thing to determine when to start weeding out your brass other than checking for cracks and separation? One last question, I’ve read where it is common on belted mags to get a bulge just in front of the belt where the sizing die doesn’t make contact. Do you see this and does it cause the brass to thin and separate there? Do you use a special die to help eliminate this issue? Thanks in advance for your replies.
