ARC Coup de Grace Builds

[TKO]

I have a ton of H4350 and I'm trying to load the 109 Berger slow at around 2750fps out of a 22in barrel. My concern was not having enough case fill in order to run them at 2750. But looking at your data with 37.3g and 2833, I think I will be okay to get 2750. Are you at full case capacity with 37.3?

I don’t think you will have a capacity problem using Alpha OCD brass trying to achieve that velocity. I would run a ladder test in .2-.3 increments checking for pressure signs along the way. You’ll probably end up around my powder charge? I was going to do some further bench side loading w/ my LE Wilson in line seating die but it was leaving a pressure ring around the nose of the bullet, I had planned on testing more velocities using my favorite “jump” value. I was planning on going up to 38.3 gr. Let us know how it works out