Try switching to pyrodex RS loose powder. Or the other thing you can do is stick with the powerbelts. I can usually get around 7-8 shots with 120 grains pyrodex RS/ 295 grain powerbelt before i have to run a wet patch down to break down some of the fouling. Does the first shot load easy with the sabot? I dont use sabots so i honestly cant help you there. But if you can get this problem fix, i'd be sending it back and getting a refund.