zeroing effect at different distances

1. ZERO 25 yd 100 yd 200 yd 300 yd 400 yd 500 yd
100-300
yd
vertical
spread
25 yd 0 2.9 3.2 -1.9 -14 -35.4 5.1
100 yd -0.8 0 -2.7 -10.7 -25.7 -50 10.7
200 yd -0.4 1.4 0 -6.6 -20.3 -43.3 8.0
300 yd 0.1 3.6 4.5 0 -11.4 -32.1 4.5
1. Disclaimer: Winchester non-military ammo using Winchester ballistic calculator.
2. The Army E-target is 40” high. 29.5” from bottom to shoulder. Ctr of Mass roughly 15”.
3. Aiming at the top of the head at 500 yd, the bullet would roughly hit 10” below Ctr of
Mass.
4. Conclusion: No meaningful difference between 25 yd zero & 300 yd zero. Given a real-
world shooting in a variety of scenarios (wind, moving shooter, moving target, prone vs
offhand, etc.), ammo accuracy round to round, the batch-to-batch ammo variability, rifle
handling, etc., 3.3 inches is not significant. It would be far more important to zero fairly
frequently (e.g. printing a zeroing target on ration cases).