Primos Hunting Calls. Primos Big Buck Grunter. The inhale-only feature makes this call 100% FREEZEPROOF which allows you to hunt trophy bucks in extremely cold weather. This is a double-reed call that adjusts from Estrus Bleats to throaty buck grunts. Also, knowing your direction and which way the wind is moving is critical to a successful hunt, which is why we have provided a built-in compass. Primos Model No. 722. Primos Game Calls Big Buck Grunter. Primos Hunting Calls.
