All the Long Range Science tools and calculators. Free tools to access any time. Paid tools add cloud save, bullet libraries, deeper physics, and custom cartridge/load tracking, session logging and analytics.
★ marks a paid tool. Everything else is free, no account required.
Ballistics Calculator
Full G1/G7 trajectory solver. Enter your bullet, conditions, and zero — get a complete drop and drift table.
Run a solution →Advanced Ballistics Calculator
RK4 solver, bullet library, spin drift, Coriolis, rifle truing, and cloud save. The full physics engine.
Open Advanced Calculator →Bullet Stability Calculator
Miller Twist Rule with gyroscopic stability factor, visual gauge, and muzzle RPM. Know if your twist rate is right.
Check stability →Ballistics Charts
Pre-computed G7 drop tables for popular factory loads across common long-range cartridges.
Browse charts →Neck Tension Calculator
Find your actual neck tension from bushing diameter and wall thickness, or flip it around to find the bushing or expander size you need.
Calculate tension →Cost Per Round Calculator
True per-round and per-box reloading cost from brass, powder, primer, and bullet prices — with amortized brass reuse and an annual cost projection.
Calculate cost →Group Analyzer
Measure extreme spread, mean radius, and SD from POA directly from a photo of your target — plus a ready-to-dial zero adjustment.
Analyze your group →Hit Probability Calculator
Know your odds before the shot. Enter your velocity SD, group size, and target dimensions — see your hit probability.
Calculate probability →Load Development Lab
Track, log, and auto-graph charge weight and seating depth tests across sessions, with cloud save.
Open Lab →My Rifles & Loads
Every rifle and load you’ve saved, organized in one place — import bullets and Load Lab data directly into each load.
Manage rifles & loads →My Bullets
Every bullet you’ve trued, saved here for reuse across the Advanced Calculator, Load Lab, and your rifles.
View saved bullets →MOA ↔ MIL Converter
Instant unit conversion for any scope adjustment, with real-world reticle context and scope click counts built in.
Convert now →Ranging Calculator
Known target size and reticle reading gives you precise distance. Works in MIL or MOA.
Calculate distance →Recoil Calculator
Get felt recoil energy and recoil velocity from bullet weight, powder charge, muzzle velocity, and rifle weight.
Calculate recoil →