People always say to use enough gun, but how do I know what enough

>>33153567
By experimenting

>>33153567
Shot placement, shot placement, shot placement.
There have been people who have dropped brown bear with .22 to the heart. Though just because they have doesn't mean you can first rattle out of the box. It all depends on the context. I'm sure a .30 cal rifle round will kill a hippo if shot in the heart, but if that fucker's charging I'm blasting open is skull with the biggest rifle I can pick up.

>>33153567
Unfortunately, OP, it's even harder nowadays, because of the revolution in bullet design. A lot of calibers which would have been marginal or worse for a certain intended game now may actually be useful.

Having said that, enough gun in North America tends to be a .30-06 with whatever load you feel necessary. A bit light for the big browns up north, but not bad.

>>33153567
usually its best to go by general consensus.

.22WMR for yote
.223 is ok with dear if its legal in your jurisdiction and within 200yds, shot placement is importanter with this though
243 is a very popular dear cartridge for a reason
black bears dont take much more than deer, .223 might just slightly not make that cut off though
not sure on the other two

>>33153706

Nobody should take hunting advice from a guy who can't spell 'deer'

>>33153733
Are you retarder