I used 90 - 100 grains T7 FFFG in my CVA Hunterbolt .45 with the 200 grain SST. I've taken 1 deer with this and it worked just fine. I would suggest trying 2 T7 pellets with the 200 SST and see how that shoots. I would highly suggest switching to loose powder if you want to get the best accuracy. You can use 150 grains of pellets with the SST, but definitely not the Powerbelts. Based on my limited experience, I would use the SST over the powerbelts, but if you want to use powerbelts I would use the heavier 275 grainers with 100 grains of powder or less.