Have been thinking about getting the same gun as I already have a 4" 500 S&W so all I would need to do is shorten some brass.
Since I have no intention of running full bore loads was wondering what those who own these use for powder for 900 to 1200 fps loads. At this point I use Unique for the 500..
18.0 350 Berry's Plated Bullet 1050 fps
20.0 350 Speer, Hornady or Sierra 1240 fps
Bob