My new side arm should be here tomorrow WAHOO! I've reloaded for 40 years but for the life of me I've never done a "roll crimp" & I've loaded my Black Hawk .41 mag w/no issues or crimps. BUT it sounds like a roll crimp is called for in my new side arm? I'm loading 300gr Noslers in new winchester brass / CCI 350 primers & 22gr of 300 MP... OAL 1.61 SO how do I "roll crimp" these beasts... and any suggestions on the loads. This is griz country and snicker if you want... but there are bigger and bader things out there!