What Is Maximum Point-Blank Range (MPBR)? Zero Smarter, Think Less.
Your 100-yard zero works. MPBR does more of the work for you. Here is how a smarter zero keeps your bullet in the kill zone from close range out to the limits of your load.
Precision BallisticsKnow Your Bullet.
Know Your Bullet.
Know Your Shot.
Science-backed ballistic calculators and educational resources for hunters and long-range precision shooters.
Ballistic Tools
Built for the Field, Backed by Science
Every calculator is grounded in established external ballistics models — no guesswork, no marketing spin.
Flagship
Ballistic Trajectory Calculator
Full trajectory modeling with environmental compensation — wind, altitude, temperature, and humidity. Visual graphing of drop, velocity, and energy at distance.
Built-in
MPBR Calculator
Determine your Maximum Point-Blank Range for any cartridge and target size. Set your zero once, hunt confidently at any distance within range.
Built-in
Energy & Velocity
Compute kinetic energy and retained velocity at distance. Make data-driven decisions for ethical hunting and long-range terminal performance.
From the Lab
Learn the Science Behind the Shot
Articles written for shooters who want to understand their data, not just read a number off a chart.
Why Bullet Trajectory Matters: The Science Behind the Curve
A bullet starts dropping the instant it leaves the barrel, and the curve accelerates the entire way out. Here is why trajectory is never a straight line, and what that means for every shot you take at distance.
How to Read a Ballistics Chart
Most tools give you a table of numbers. The BSL graph shows you the continuous curve. Here is what the axes mean, how to read holdover from the graph, and how to use wind drift before you ever take the shot.