Well, they typically drum anytime they strut. Hearing him drum depends on how well you pick up sound in that lower range, how quiet the woods are, and the lay of the land (line of sight). For me, because I hunt hills or rolling flatland, I typically only hear it 20 yards and under. Opening day I called in 5 toms, 3 went into strut on a hillside facing me and my son about 60 yards. I could hear the boss tom drumming for 20 min, but in ~20 years of turkey hunting, that's the only time I can think of where I heard the drum farther than 20 yards