This thread is so "Campfire"! The guy with the most experience gives a definitive answer. Specifically, 458 says a 270 with great bullets is acceptable. Then those with little to no experience, actually none compared to him, present endless thoughts about how he's wrong. Unbelievable.
I don't know how much experience you have, and what 458 means by "acceptable," but about six months ago, on this site he, shockingly, mentioned how superior the .458 WM worked on brown bear. He must believe it's significantly better than a 270 or his name would be "270." My post above suggests that a .270 is okay too. But "458" uses a "458" for a reason. It's more than the "acceptable" minimum. 270 works; 458 works better. How many BB have you shot? While you criticize others' opinions?
