I have a 45 cal CVA Optima Pro Muzzleloader that I am shooting 150 grains of 777 pellets with Powerbelt 225 grain projectile. I am going to the range today to try out loose powder Pyrodex RS and Hornady SST Sabots. 200gr.

Just wondering how much powder I should use with this load...

I only deer hunt with the gun, and have shot three deer with it and haven't been too impressed with the Powerbelt's. Shot one directly broadside in the shoulder 50 yards away and it bounced off and slid up the neck.. She ran 250 yards before piling up.. Maybe i'm expecting more knock down power?