Originally Posted by Coyote_Hunter
Originally Posted by Yondering
...
My one problem with the 7mm Rem Mag, as a handloader, was brass life; don't remember what brands I used but never got more than 3-4 firings before cases started to crack just above the belt.


I used to have a similar problem with IMR4831 and 160g bullets. Dropping back a bit on the powder charge helped significantly. Or you may have to use different powders to get the velocity and case life you want. I get 3000fps easily using H1000 and H4831SC with North Fork 160g bullets.


Don't have it any more, but I was mostly using Re22 for 3000 fps with Nosler 160gr Partitions.

I never sized enough to bump the shoulder back (mostly just partial sized with a FL die), but I seem to remember the case body still getting sized down quite a bit near the belt. It may have been a matter of a tight die and large chamber overworking the brass, I couldn't say for sure at this point.