I just went through fire forming my brass. 75 grains will work good for the fire forming. I went lighter on powder than I should’ve. I jammed as well. Took me two firings to get the shoulder blown out to match the chamber.
Hey, thinking about going from the 300 PRC to 300SM. Does anyone have barrel twist recommendations? I see the load data lists 1-9. I am currently shooting a 1-8 in my PRC. This is not a hunting a rig, heavy bullets only for competition. Thank you.