Figured I would report back on initial loads. All loads shot out of a 24" Shilen Select Match with 1/7.5 twist on a Rem 700 action.
Used the 80 ELD-X and 64 Nosler Bonded. All were Alpha LRP brass with CCI-200's.
Both H1000 and N565 are a little on the slow side with 80's. Topped out around 3150 with 45 gr of each (they were equivalent), and this was a compressed load. No concern for pressure.
With H4350 and the 80's, I topped out at 38 gr and 3050 fps. I think H4350 is a bit too fast for maximum velocity.
The Nosler 64's got up to 3550 with 42.5 gr of H4350. Didn't try any slower powders.
Plan for next session is to try some N555, N560, and Superformance.