Any 30-06 should be able to get 3,000 fps with a 180 grain bullet--once. <img src="/ubbthreads/images/graemlins/grin.gif" alt="" />
If you're getting 2850 (allowing an extra 50 fps for the extra 2" of barrel), at 58,000 PSI, and increase the charge 3 grains, you'll be at ROUGHLY 65,000 PSI, still 5 KPSI short of the point where normal pressure signs show up.
As Dutch once succinctly observed: Muzzle velocity is a pressure sign.
There are no magic "fast" or "slow" barrels. Acceleration = Force/mass. Speed is Vinitial + the integral of force over time. Force is pressure times the area of the base of the bullet - friction. Getting bullet speed without pressure violates the Law of Conservation of Energy.
