N.J. Stat. § 23:4-13
A person shall not use in hunting any fowl or animals of any kind any firearm except as permitted by the provisions of the State Fish and Game Code, or, in the absence of such provision in said code, except a shotgun being not larger than ten gauge, and capable of holding not more than two cartridges at one time, or that may be fired more than twice without reloading, or use a silencer on any firearm when hunting for game or fowl, under a penalty of $100 for each offense.
The division in its discretion may issue permits for the use of a rifle for shooting woodchucks only. A person shall not use any missile larger than as permitted by the provisions of the State Fish and Game Code, or, in the absence of such provision in said code, larger than number four shot in possession in the woods or fields at any time other than during the open season for killing deer, under a penalty of $100 for each offense.
N.J.S. § 23:4-13