Hello gents, i spent the last year working on a cartridge design to duplicate 257 roy performance in a 6.5 mm. Bored out an mgm encore barrel to accomodate the 6.5x65 rws case. I fireform to blow the shoulders out to .462 with the 30 degree angle of the creedmoor. All that is easy, load development was the hard part. I tried 7828, rl22, h4831, win 760, and rl-17. All started giving me primer squashing at around 3,400 fps with 100 gr ttsx. I had just about given up on higher velocity til i tried h100v. Now, i feel like i have something different.
60 gr h100v
Cci br-2 primer
100 gr ttsx
3,602 fps avg 3 shot 26" barrel
I figure it runs about 65 k on pressure. Primers just barely cratering. Now, i hope i can hit something with it. I built this rifle for deer hunting, so not worried about .2 moa, but those monolithic bullets like the speed for shrooming!
60 gr h100v
Cci br-2 primer
100 gr ttsx
3,602 fps avg 3 shot 26" barrel
I figure it runs about 65 k on pressure. Primers just barely cratering. Now, i hope i can hit something with it. I built this rifle for deer hunting, so not worried about .2 moa, but those monolithic bullets like the speed for shrooming!
