Zero Calculator
Find the ideal sight-in distance that keeps your bullet within a defined vital zone across your entire practical range. Uses a point-mass trajectory model with G1 drag.
55gr FMJ/SP (M193-class) · BC 0.243 · 3240 fps @ 20"
Effective BC: 0.243
Typical: 14.5"–20" · Corrected MV: 3140 fps
How far off point-of-aim you're willing to tolerate. Smaller = more precise (target shooting). Larger = practical hunting/duty vital zone (deer vitals ≈ 6–8").
Recommended Zero
36 yd
Sight in here
Far Zero
307 yd
Also dead-on here
Max Ordinate
4.7"
Highest point @ 178 yd
Max Point Blank Range
357 yd
Aim center, hit within ±4.75"
Bullet Path vs. Distance
Load Summary
Verify at the Range
This is a calculated estimate based on a point-mass ballistic model. Actual point of impact varies by individual rifle, ammo lot, bore conditions, altitude, temperature, and shooter technique. Always confirm your zero with live fire before relying on it — especially for hunting or defensive use.