ORIGINAL: Prairie Wolf
I think these rounds were supposed to be loaded at 60 grains and instead were loaded at 70.
I also think the WSM's have a pretty high bolt thrust due to the larger diameter and high operating pressure. So maybe some case head markings are normal.
Anyway, I finally have some ammo I am comfortable shooting. It is pretty bizarre to find factory rounds with 10+ grains too much powder in them.
If they were 10gr too much, it might blow the action up. 7mmWSM load range anywhere from 59gr to 72gr depending on powder. I bet they use H4831 or something liek that loading them up. And max is over 67gr.
I don't care what load, federal primers will flatten no matter what. They are not a good indicator. When you see the primer so flat, you can't feel the difference between the brass or primer with fed primers, its overloaded.