The last 100 yards of the stalk and the execution of the shot itself — the highest-failure-rate window in mule deer hunting. Inside this distance, every prior skill (planning, thermals, stealth) is already locked in; what matters now is being fully ready before the buck stands, executing in a 5-second kill window, and recovering correctly if the shot misses or the stalk blows. "Mature mule deer don't give you time to fumble around. They stand, they pause, they move, and you either seize the moment or watch it disappear."
The hunter transitions to a crouch or belly-crawl at the 100-yard mark. He stops at his final shooting position with at least 50 yards on the bedded buck (closer if cover allows) and gets fully set: rangefinder out, every nearby landmark pre-ranged, pack/bipod or shooting tripod settled, turret pre-dialed for the rifle or anchor visualized for the bow. He clears debris from his shooting lane, settles his knees so pack straps won't bind his draw, controls his breathing. Then he waits. He does not move, draw, or shift — he is already ready. When the buck stands, the rifle hunter confirms backstop and squeezes; the bow hunter draws as the buck's head turns or moves behind cover, anchors, releases. He plans for the 5-second kill window: stretch, pause, two steps, gone. If the shot connects, he marks the exact spot the buck was standing, listens for impact tone (flat crack = vitals, dull thud = gut/shoulder, hollow = miss), watches the reaction, and waits 30–45 minutes before tracking. If the stalk blows up without a shot, he watches where the buck goes (typically rebeds 200–400 yards out), loops wide to regain a glassing angle, and plans a second stalk later in the day or the next morning.
Hunters imagine the buck standing, walking around, and offering multiple angles. Reality: stretch, pause, two steps, gone. The kill window is often a single broadside moment lasting 5 seconds. The hunter who isn't fully mounted, ranged, and breathing-controlled before that moment misses it entirely. Pre-position discipline is the single biggest leverage point in the final 100 yards.
Hunters watch the buck after the shot. But mule deer bound hard from almost any hit — visual reaction is a poor diagnostic. The impact tone is the better signal: a flat crack means heart/lungs, a dull thud means gut or shoulder, a hollow whack means brush or miss. Trained ears can tell within 1 second how dead the deer is.
Most hunters treat a blown stalk as the end of the hunt for that buck. But mule deer that weren't scent-contacted rebed within 200–400 yards. If you watch where the buck goes, mark the rebed line, and loop wide for a new glassing angle, you can often kill the same buck later that day or the next morning. Hunters who walk away forfeit half their opportunities.
Most hunters take the shot when the shot is "available" — the buck stood, the angle is broadside, the rangefinder reads, fire. Dioni Amuchastegui waits 1-3 hours after the shot becomes available to verify the buck's routine, confirm wind stability, dial the position, and run dry-fire reps from the actual shooting platform. Patience compounds shot quality: the longer you sit, the more you learn about the wind, the buck's pattern, your own pulse, and whether the position you built actually holds across that whole hillside. At 700+ yards, the marginal hour of observation is worth more than the marginal hour of stalking.