I have used everything from the lost river, accubond, x bullet, and more. I made my decision a few years back to go with the interbond 139 and have had great accuracy and performance. It was the lowest priced bullet I tried and had the best groups. I have since taken a coues and a muley well over 500 yards. Ill need to double check when I get home tonight but I think I am using 74.5 grains of rl22. shooting at 3300 fps.