For self defense, a 243 is better than a no 43. If that is what you have available, then it is better than bare hands. Besides, the current trend is to use the smaller cartridges for most hunting.
As for myself, I still prefer my cannons for hunting. 300WM for deer, elk, and moose. For Mr. Bruin my 378 does the talking.
Its a shame that any of this ever went to court. The man defended his family and dispached the wounded animal.
No such thing as a stupid question. What is stupid is not asking it.