I think MM, and I know my own response, was aimed at the effectiveness of the hammer. If I was after elephants, cape buffalo, lions, I'd likely want something with a bit more diameter and horsepower. We know it will work but if I'm spending $10k for a high end African hunt, I'd learn how to shoot a better hammer. The point is a bit moot because I don't think a 30 cal is legal for the above mentioned species.
I have zero experience with Ursus arctos, but I could see how a 200 gr Partition from a 30-06 would be just as effective hammer as a 338 250 gr. I've shot both cartridges with both bullets and they seem to penetrate the same and the mushroomed bullets look quite similar. I haven't shot 375's into much so don't know. But if the guys that do this for a living say so, I'm in and cool with it. In lieu of an 06, I'd likely drag my 06 35 caliber derivative (35 Wh) into such situations. I've really grown to like my 22" barrel M77. Plus it shoots 250 Partitions into small groups.
