Originally Posted by Bart B
Freeboring is a way to get higher muzzle velocity with the same chamber pressure. It slams the bullet harder into the rifling and typically ain't as accurate as standard throats which are shorter. Bullets are less deformed when more gently pushed into the rifling
Roy Weatherby knew this but it didn't matter. At the ranges his cartridges were used at, a slight degradation in accuracy was an acceptable compromise to get the higher muzzle velocity he wanted.
Not to be argumentative, but:
I'm not sure that you get higher velocity with the same chamber pressure?? Isn't it more being able to increase the powder charge because of the increased volume thereby increasing velocity?