Give rl-26 a go. My dad is running I believe 42.5 or 43 I dont remember the exact charge and it pushes a 95 smk at 3200. We've had the 75 eld at 3550 as well with itHave brass fireformed and have a pile of 75gr Amax, 80gr ELDM and a box of 90gr SMK.
Nosler book doesn't have data for heavies--
Have R15, R19, H4831sc, and other slow burn powders. What other powders should I check out?