I use 3-4 short grunts.I only shoot big bucks and does, and have scared off some smaller bucks when a big boy was known to be in the area.This time of year I' ll grunt every 30-45 min. If I see a deer I will let the scene play out and only use the grunt if it looks like a shoot will not happen.I' ve gotten around a 1/2 dozen bucks that would not have given me a shoot without the grunt. FYI Knight & Hale EZ grunter