Here are the regs for WI concerning crossbows.
• Crossbows are only allowed for resident hunters 65 yrs of age or older and
disabled hunters with a Class A, B, C, or crossbow permit. The crossbow
(including compound bows equipped with full draw-lock) must have a minimum
draw of 100 pounds, a working safety, and use at least 14-inch long bolts or
arrows equipped with broadheads (requires an archery license).
Randy