I drew a muzzleloader moose tag and plan on using an early CVA .54 express double caplock. It shoots the 54 powerbelts over 120 grains bp pretty accurately and regulates well. With a moose size target, i'm comfortable out to 150 yards. My LGS ran out of BP and likely won't get any in before the hunt begins and its the only game in town. Any recommendations what BP substitute would be worthwhile trying. Thanks.