Figures may be accurate, but the real world differs in some instances. I absolutely know that .22 magnum in a Ruger Single Six is a deadly combination. I have taken every game animal in Virginia (in my youth) except bear with that combination. Even large Whitetail deer. Chronos show little difference between .22 and .22 Magnum. Yet real world difference in effectiveness is colossal. As an aside I spoke to a gentleman yesterday that has killed 9 deer with a .17 hmr. Five were shot in the neck for "bang flops". Four were shot behind the shoulder, "down right there" second "coup degrace" in some instances. This elderly man said the .17 was as effective as anything he'd used on deer. Spoke with him at a Gun Show, he was probably 70 years old or so. I believed him.