A couple of years ago I semi-decided the cut-off for an appreciable and consistent difference in "killing power" (however that is defined) is around .35 caliber.
But that's on average, and certainly doesn't apply to every single animal killed. And I might change my mind soon, as every year brings new experiences....
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
