We've got to remember that a big part of non-pass-throughs is not caliber, it is what you hit going through, and another very important factor, is too light, or too heavy of bullet CONSTRUCTION! Too light, and they blow apart on impact, too heavy, and they might not expand at all!

Lastly, I just can't resist......
The .243 or even the .22 CF's are PERFECT for ALL species up to and including Cape Buffalo.................
IF you stick the muzzle in their ear before pulling the trigger![:@]