I shoot the Traditions Vortec Strikefire Vapr. Owners manual says max load for loose powder T7 is 100 grain by volume, and BH is 120 grain by volume. Projectile used was Hornady Boredriver 290 grain. Just did a comparison today using those loads. T7 primers used for the T7 powder, Federal 209A primers for the BH. T7 group was 3.5 inch at 100 yards while the BH was 1 inch at 100 yards and 5 inches higher. Th BH is larger grain than the T7. I liked the tighter groups from the BH so I adjusted the scope, ran 2 dry patches down the barrel, cleaned the breach plug, 1st round hit dead center. 2nd & 3rd hit 3/4 inch to right touching. I put T7 on shelf. Sticking with BH