Blackout Ballistics Calculator
Updated August 2026. This calculator models real trajectory physics using the G1 drag standard. Every figure is a starting point for load development, not a substitute for confirming your own drops on paper.
A Blackout ballistics calculator has to answer one question honestly: where does the bullet actually land. Static charts give you typical figures for typical rifles, which is useful right up until your barrel, your load or your zero differs from the assumptions. This tool computes the trajectory for your exact setup: pick the cartridge and load, set your barrel length, zero distance and optics height, and it returns velocity, energy, drop and flight time out to 300 yards.
Blackout Ballistics Calculator
8.6 Blackout and 300 Blackout, subsonic and supersonic. Adjust any value; results update instantly.
Advanced inputs: muzzle velocity, BC, sight height
| Range | Velocity | Energy | Drop | Time |
|---|
Muzzle velocity
Muzzle energy
Sound barrier
Supersonic to
Subsonic and supersonic never share a zero
Run the calculator twice, once with a subsonic load and once with a supersonic, at the same zero distance. Compare the 50 yard rows. The gap is often several inches, and it is the single most common cause of unexplained misses in these cartridges. Record both zeroes, mark your magazines, and confirm on paper before hunting. The full explanation lives in our subsonic versus supersonic guide.
What this calculator assumes
Honest tools state their assumptions. This one models a point mass trajectory using the G1 drag standard at sea level with a standard atmosphere, no wind and no Coriolis effect. Ballistic coefficients for the preset loads are typical published figures for that bullet class, and you can override them in the advanced inputs when you know your exact projectile.
Three things will move your real results away from these numbers. Altitude and temperature change air density, and thin mountain air flattens trajectory noticeably. Your chronograph almost never matches the box, because published velocities come from test barrels. And wind, which this tool does not model, dominates at the ranges where subsonic loads are already marginal. Treat the output as the starting point, then confirm with a chronograph and a target.
Frequently asked questions
How accurate is this Blackout ballistics calculator?
The trajectory solver uses the same G1 drag model that commercial ballistic software runs on, and its output matches published factory drop tables closely when fed matching inputs. Accuracy depends on your inputs, particularly muzzle velocity and ballistic coefficient. Feed it a chronographed velocity and the correct BC for your projectile and it will be close. Feed it box figures and expect the usual box figure optimism.
What zero distance is best for 300 Blackout?
For supersonic use, 100 yards is the practical standard and keeps you within a few inches out to 200. For subsonic work, 50 yards suits woods ranges better because it flattens the near trajectory where those loads are actually used. Run both in the calculator and compare the columns.
Why does the subsonic load show the bullet above my crosshair?
Because it must arc to reach the zero. A subsonic bullet drops roughly 17 inches over 100 yards, so the barrel points meaningfully upward relative to your sight line and the bullet crosses that line twice. Between those crossings it flies above your point of aim.
Does this work for 338 ARC or other cartridges?
The physics engine is caliber agnostic, so entering your own muzzle velocity, ballistic coefficient and bullet weight in the advanced inputs will model any centerfire load. The presets cover the Blackout family. For how 8.6 compares against the newer Hornady cartridge, see our 8.6 Blackout vs 338 ARC breakdown.