Energy is a meaningless metric when it comes to terminal performance.Just to clarify...
Plenty of examples exist of bears shot with tiny rifles. But often they are brain shots. What is interesting about this thread is the evidence 223 with the right bullet can do well on body shots. A lot of bigger guns are probably wasting energy because they blast through with a to tough bullet. To give an example, my 375 makes a half inch entrance wound and a 2 inch exit on smaller animals. My 308 does basically the same. The difference seems to be the 308 probably has less energy left as it exits but so what? The animals die about the same. Now a softcTMK out of my 375 might do more damage as in, to much. But that extra energy is nice on a bear because I might need to shoot through the skull or take a Texas heart shot up the stern of a wounded bear headed into the brush. Despite all the pictures I don't the a 223 would do well there. But if a 223 can handle a moose my 308 could certainly kill a grizzly. I'm just a bit hesitant about going that light. Grizzlies are the only animal that stops my 375 broadside.
Bullets matter.







