You can take to the bank what some of them they say and some are full of hooey!
I read an article last night in Rifle Shooter magazine written by Kevin Steele. The article was on Buff Busters and was centered around the 458 lott. He paid some good credit to the late Jack Lott and for that I applaud him. However in the article Mr Steele refers to the 458 mag as stubby and he states that it has always lacked true stopping power. Well from what I can cypher... there is 150fps difference between the 458 mag and the Lott with any given bullet weight. I can throw a rock 150 fps.
The load he was refering to as lacking stopping power was a 500 grain slug at 2150fps. Sounds like we're all undergunned!