You will have to define "sniper rifle". There is no meaning to that term, other than an accurate scope mounted rifle. That includes most hunting rifles.
A "sniper rifle" is simply a rifle employed for that purpose. So long as the "sniper rifle" meets the criteria and restrictions for hunting firearms in the state you're hunting in, you can use it.
1-in-66" barrel twist is a Kentucky rifle, not a Hawken. The Hawken brothers used a lot faster twist than that; you needed it for the prairies. Googling "Kentucky Rifle kits" will give you several makers of these rifles in kit form. As to legality for hunting? Any muzzle loading rifle that's at least 50 caliber is legal to hunt with in Idaho.
In the state of Missouri Its perfectly legal to hunt with a black powder rifle during deer season. In all counties
usually a .50 cal sniper rifle, but also has the ability to fly in and stab it with a katana.
It may be, but there'll be restrictions on things such as magazine capacity, types of ammunition you'd be allowed to use, etc., much the same as with any other hunting rifle. What you'd be hunting with one... maybe a safari hunt in Africa, in which case, you'd probably run into laws prohibiting possession or ownership of weapons chambered in military calibres.
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.
It depends on the gun and caliber but most semi-automatic rifles such as the Ruger .22 are legal to hunt with in California.
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.
Everything from mice to elephants has been killed with a 22. You will need to get a copy of your state's hunting regulations to see what is LEGAL to hunt with a 22 LR.
Depends on what you are hunting. See the link below to the Illinois Game Regulations.
yes as long as u have a liceances i believe