2850 FPS with 140g Berger VLD. 25" Krieger barrel. N-150 powder and Federal primers. This is with a minimum dimensioned chamber and freebore diameter and length as specified by Hugh Henriksen for the above bullet.
The firing pin assembly in the above rifle is a Remington specification original weight spring and firing pin mass, .075" diameter at the tip.
A bushed firing pin is not necessary if the firing pin mass, shape, and spring weight is correct. Typically a bushed firing pin is undesirable, depending on how much it deviates from the above optimum parameters.
Greg Walley
Kelbly's Inc.