I ran 50 strokes of JB's thru my BC before i shot it. The Barnes TEZ in the blue sabot didnt shoot well for me, they loaded way to easy. I would suggest you try a harvester short black sabot with those barnes TEZ. Im getting excellent groups with that load. I shoot the SST's for practice and hunt with the barnes. They shoot the same out of my gun with the HSB sabots. I also wouldnt swab between shots as sabotloader said.