I load a 252gr 429421 in my .44 with 9.0grs of Unique for 1104 fps from a Ruger SBH-Hunter. I'm not sure but I seem to remember 13grs is max for that weight cast bullet with Unique. The 9.0gr load shoots into 1 1/4" at 25yds for 12 rounds from a Ransom Rest. It's a nice walking around load that would still put a deer down without any trouble. I've taken two does with it, and it worked just as well as my normal hunting load of 265gr cast GC @ 1405fps.
