Mechanical precision
The rifle-and-ammo cone, set in MOA. This is the true capability of the system before the shooter or conditions touch it.
Exterior ballistics, made visible
A browser-based teaching tool that separates a rifle's mechanical precision from aim wobble, wind, temperature, cant, and reloading consistency — then shows how the group and your odds of a hit change as distance grows.
Real groups blend many sources of error. The tool lets you turn each one on independently so you can see its individual contribution — and how they stack.
The rifle-and-ammo cone, set in MOA. This is the true capability of the system before the shooter or conditions touch it.
Aim wander from hold and position, in MOA. It grows with distance and often dwarfs mechanical dispersion in the field.
Full-value crosswind modeled with a standard lag-time method, so drift scales realistically with range, velocity, and BC.
Vertical shift from a departure off a 70°F baseline, illustrating how ambient conditions move your point of impact.
Left or right cant combined with your elevation dialed produces a horizontal error that increases the farther you shoot.
Muzzle velocity, ballistic coefficient, and extreme spread translate ammo consistency into vertical stringing on the target.
Set your own numbers, tap the target to place an unconfirmed zero, or enter your real tapped group with Custom Zero. Nothing you enter leaves your browser.
What each mark on the plot means.
Filled dots landed inside the selected scoring zone; hollow or red dots fell outside it.
The crosshair marks where you told the group to actually zero by tapping the target.
The diamond is the group's mean point of impact after bias from cant, wind, flex and temperature.
The dashed ring shows wobble plus mechanical spread combined — the realistic cone your shots fall within.
No. It is a simplified teaching demonstration. Always confirm your real zero with live fire on a safe range; do not use any value here for come-ups, wind holds, or load development.
It lets you tap where your real shots landed on a reference bullseye. That measured group then becomes the basis the simulator runs, with wobble, wind, cant, temperature, and distance still applied on top.
No. Every calculation runs entirely in your browser. There are no accounts, no cookies, and nothing you enter is transmitted or saved once you close the page.
Yes. Use the compare mode inside the simulator to run two independent setups against the same target and conditions side by side.