Well, you guys can hash out the physics of this thing, cause I fear this is over my head. ButI know one thing without question......Let's say I shoot a target for 35 yards and it is 40. My old Bear Whitetail would shoot plumb under the deer, not even touching it. Now, my new UltraTec would put a kill shot on it, no question. One thing is obvious......speed is a contributing factor to better shooting. I also agree, though, that too fast contributes to poor shooting.