efw, I've seen evidence of good "splatter effect" (good, descriptive term
) when using Remingtons' 240 gr. SJHP. It's a very soft bullet and expands readily at impact velocities produced by pistol length barrels. I've loaded them in my .44 mag rifles too, but they are a little too frangible for my tastes at those velocities; depending on the particular rifle I'm using it's not too uncommon to see approx. 300fps more from my rifles than from my 7.5" Redhawk.
FWIW, my recent edition Hornady reloading manual lists 20.1 grains of H110 as max for the 300 gr. XTP.
