I'm shooting 44spl out of a Marlin rifle but my notes show accurate loads for the 240grn cast bullets with 5.7 Green Dot, 5.1 Titegroup, 12.0 AA#9, 7.5 Power Pistol, 6.7 Herco, 4.8 SR7625 or 8.0 HS-6. Some of these loads were with soft swaged lead bullets so the charges are lower than hard cast.
Bill