Looking for the max load for for the 300 gr X flat nose in the 45-70 using Reloader 7 powder, rifle is a Marlin guide gun, I have found data but some seems too conservative and some seems a little too hot for me to try without a bit more info, I do work up my loads but i'm worried about exceeding the rifles strengh without getting pressure signs first, you can PM me if you'd rather not post your loads online.