Out of a Colt, I think not. At least not for long. Down about 900fps will make for a much longer relationship. In the long run, I think you will come to enjoy the cast bullet overall. You get equal velocity at somewhat lower pressure and much less wear on the gun. Even at 1100fps, jacketed bullet expansion will be a sometimes thing so why push the gun. Also, inside 60-70 yards, even at 900fps, a 300gr bullet will make any game shooting more a question of possible pilot error rather than equipment failure.