Bingoc
Well-Known Member
Has anyone had the experience using the 257 Roberts + P brass over the non +P brass? And what differences have you found between using it and the non +P brass. I know that the +P brass has a thicker wall than the non +P version and the published loads for the non +P have to be reduced when using the +P brass, but what is the real advantage? Is there a substantial increase in velocity or life of the brass or etc.