I can't add to what the other gentlemen have said other than echo it. Each state has it's own regulations. Check with the local DNR office or sporting good store for a regulation pamphlet.
In Georgia, the law states "any rifle .22 CENTERfire or larger may be used"
Handguns it's "any producing at least 500ft lbs of energy at 100 yards"...
I expect to pass through this world but once; any good thing therefore that I can do, or any kindness that I can show to any fellow creature, let me do it now; let me not defer or neglect it, for I shall not pass this way again. ~~Etienne de Grellet