My freshly cast and PC'd Penta HP boolits from the MP 454640 are weighing in right at 261-262 gn. This is my first time loading with this boolit. I'm stuck on if I should start out with the published data for a 250gr LRNFP or the 270SAA, as my Lyman cast handbook does not have any data for a 260gr projectile.
If anyone feels comfertable, I would love to hear what load you have success with for this Boolit with the Penta HP and what OAL you are seating to.