std7mag
Well-known member
I got my data from Hornady's yearly "manual".Yeah, I’m going to have to pick up a pound to tinker with over the off-season. Not finding any published data for H100V in the .257 Ackley using projectiles in the 90-100gr range, but I figure I can start with max loads for .257 Roberts and work up slowly to pressure signs.
Also ordered a box of the 95gr. Hammer HHTs. Feels like 3200fps should be easily attainable with their lower bearing surfaces.
But i'm shooting cup & core bullets.
Barnes website might have something.
Otherwise, like always. Start low and work up.