Use this bullet and Leverevolution powder. I am shooting my new to me 1949 Marlin 336 SC 30-30. This bullet of COWW + 2% tin and gas check weighs 200 grains. I was able to work up to 2135 fps and a 1” group at 50 yards. Start with the 160 grain load on the can reduced by 10% and work up. This beats the famous 303 Savage 190 grain load by over 200 fps.