The 250AI should provide performance very similar to the 25-06 way out performing any standard Bob out there. my standard 250s provide essentially identical performance as that of the Bob. I am able to push 100 grain match kings over 3000fps easily and 115 bergers over 2800fps with 24" tubes and imr 4064. There is nothing wrong with the standard Bob but Ackley improving it is way worth the minor hassle of fire forming.