Depends on your state. Some states allow hunting with semi auto rifles, and some don't.
.243
Yes
Deer hunting with a .22 is illegal in most states, including California. It's too small a rifle to use on deer, you're better off using it for shooting squirrels, game birds and pigeons.
no
Deer, bear, elk, moose.
Whitetailed deer and similar sized or smaller animals.
No.
No. .243/6.5mm is the minimum allowed for deer in NC.
Yes, subject to legal restrictions which vary from state and even within some states. The 30-30 is considered the classic deer rifle.
In the state of Missouri Its perfectly legal to hunt with a black powder rifle during deer season. In all counties
When you say Air Rifle you are referring to a pellet rifle not a firearm. At present there are no 300 Cal air rifle being made.
Maybe. Depends on where the deer is shot, from what distance. Much more likely to WOUND the deer- which is why in most US states, it is not legal to deer hunt with a .22 rimfire.