I use the .45 240xtp mag behind 100 grains of BH209. Ballistics info from Hornady is BC = .160 and from Blackhorn muzzle velocity= 1966 fps for a 100 grain charge. Run this thru a ballistics program, you get a 100 yard velocity of 1524 fps. These numbers are in the working range for this bullet in the velocity chart Chap has included in his post. Don't need a magnum load to get them going at intended velocity. Haven't experienced any undue fragmentation with this load. Been hunting with 777 until this year when I switched to BH209 for about 5 years now in a TC Encore.