If you want to shoot ball-ets you might have better luck with the 1-48 twist. If the ball-ets do not work you could still shoot roundball out of the 1-48 or even some conical loads. The 1-48 twist is more versitle. The 1-70 twist is really made for shooting roundball. Still a .58 caliber roundball is nothing to sneeze at. You have a lot of power. Either of them would do. This idea of the ball-et would suggest the faster twist though.