if your talking an encore and you aren't recoil shy I used 51.0gr of benchmark under a 440 gr cp in my 7.5" BFR for almost 1700 fps and excellent accuracy. I'm 6'3" @ 250 and it was all I could do to control the BFR, I let one person shoot it and when he almost ate the gun I never let anyone else try it. I shot a live ponderosa pine at about 50 yds, the tree was probably 18 to 20 inches in diameter and the bullet went completely through it.