You take a brand new Winchester M-70 in .308 Win (24 inch barrel) and chronograph ten shots with Federal 168 match hollowpoints. Velocities average 2674. Ten inches of the barrel is cut off - down to 14 inches and recrowned - and the velocities are rechecked. Lets see who can guess what the velocities would average. I have actual lab data of such a test - who can guess the closest? Will give the answer after we have a decent response.