Mike, there aren't any more miracles in firearm ballistics than there are in audio technology. Sure, if you look at the Remington tables(I linked just a few in .308), if the bullet weights are the same, the velocity is much lower. For significant recoil reduction there has to be lower velocity, lower bullet weight, or a combination of both. As John B. pointed out, they say that the bullets have been redesigned to expand well at the lower velocities. They also emphasize that they're for typical situations where shots are under 200 yards.
