I'm about ready to try RE-15 with Hornady 88 ELD's. I don't have any 75's right now, but if I can score some I'll give them a whirl.
In the meantime, I've attached Hodgdon's preliminary load data for your use. It has a lot of 77 ELD loads.
Thanks for posting the Hodgdon data. Looks like CFE223 and Leverlution take the speed crown for the 75gr and higher bullets. Since I've started loading 30-30, might make me actually buy some Leverlution finally, haha. H414 seems like a sleeper I've heard nothing about before this chart.
Anybody know what kind of powder (ball, flake, stick) it is? Might be a good one to dev so you can find it in stock regularly, akin to the folks who found alternatives for A1680 in 300BO and H4350 for 6.5C.