The point is that, all other factors being equal, a projectile with significantly more KE at impact can be expected to do more damage than the same projectile with significantly less KE.
The concept isn't hard to grasp - most 5 year old kids have a sense of it. Apparently some adults have a really tough time with it, though.
Coyote Hunter - NRA Patriot Life, NRA Whittington Center Life, GOA, DAD - and I VOTE!
No, I'm not a Ruger bigot - just an unabashed fan of their revolvers, M77's and #1's.
A good .30-06 is a 99% solution.
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