In my Marlin 1895 GG, this shoots very well for me...
Hornady 300gr HP
48.3 gr RL7
Federal Large Rifle Primer
Starline Brass
COAL 2.550 (at cannelure)
I'm sure you know all of this, but: Note that this is a rather warm load. Don't start there; start lower and work up. Don't use this in guns that can't handle it (if you're not sure, ask!).
-nosualc