I seem to recall that Flinch recorded something like 3043 fps. with 180 gr. Nosler out of his 27 inch barreled custom '06. He was shooting Federal High Energy ammo which uses special loading techniques to get enough slow burning powder into the case. Handloaders who have pulled the bullets from such loads have reported that they can't get the powder back into the case even with long drop tubes.
I'm tempted to build a 26 inch '06. Maybe some fancy, slow burning powder like one of the Ramshot line might do something like 2900 fps., then again, maybe not.
What I've learned over the years is 150 fps. or even more, will make very little difference. The very best it might do is give your choice of bullets a little more expansion range way out there. Since we have some excellent bullet that expand at pretty low impact velocities, I don't think even that small advantage is worth much. I'd much rather have very accurate, very consistant ammo for that "way out there" shooting. E
