There are many gun writer phrases that indicate amateur status: one-shot-stop, man stopper, king of defensive handguns being just a few. The second I read such crapola I think to myself, "This dude ain't got a clue." You'll never read any such BS in professional law enforcement journals; e.g., "FBI Law Enforcement Bulletin" "Police Chief" etc.
Declaring that there is a concept of a single best cartridge for every species of big game is beyond ludicrous. Do you have any clue of how many confounding factors there are in making such an amateurish guess?
