Picked up a Marlin Camp 9 and love it. Wish it was the 45, but what the hell. Here is my problem. Loading for my XDM 9 with 124gr FN, RN and HP using Berry's Copper Plated and Rainier's. Now I want to load for the Camp but have a few questions. If I am using 4.8gr Bullseye which is pushing 1150fps and the manufacturer recommends not exceeding 1200fps should I change my powder to a slower burn such as Alliant's Reloader 7? This is designed for a carbine, magnum, varmint rifle up to a 308? I am thinking that there is an added pressure buildup due to the length of the barrel @ 16". Not sure of the twist ratio.