September 1, 2011, 07:16 AM
Anyone have any 6.5 X 57 Mauser load data? Specifically for a 1:9 twist barrel. Several months ago I picked up a a very nice sportized T38 Arisaka in 6.5 X .257 Roberts. I rechambered to 6.5 X 57 Mauser. Just started working up loads with 100 gn Nosler BTs and Hornady 120 gn A-Max. Gun didn't seem to like the A-max, but did the 100 Gn Nosler BTs. Tried to powders IMR 4350 and H4895. With both powders groups tighten up as loads increased. Didn't reach max loads with either as just strating out. Best 4350 load was about 1.5". Best H4895 load was under 1". Amasing for an old Jap sportized rifle.