⌖ WEAPONTESTER
Phase 1 · Bolt-Action · .308 Win + 6.5 Creedmoor

Build a rifle.
Test it.
In your browser.

Compose a precision rifle from real-world parts. Pick your cartridge. Dial wind, atmosphere, and target distance. Watch a physics-accurate trajectory roll out — drop, drift, energy, hold-over — modeled on the same Modified Point Mass math used by JBM and Hornady.

Start a Build → How it Works
Drag Models
G1 · G7
Wind
Full Vector
Spin Drift
Litz
Cost
$0
How a Test Goes

Compose. Dial. Send it.

01
Build the rifle
Pick an action, barrel length and twist, stock, optic, and (optionally) a suppressor. Real-world parts. Live spec readout as you swap pieces.
02
Pick the cartridge
Choose from factory match loads — .308 Win and 6.5 Creedmoor at MVP. Each load carries verified BC and muzzle velocity from manufacturer data.
03
Test on the range
Set target distance, wind, and atmosphere. The trajectory engine produces drop, drift, velocity, energy at distance, max ordinate, and your hold-over in MOA or MIL.
The Math

Not a toy.
A simulator.

We use a Modified Point Mass integrator with G1/G7 standard drag functions, ICAO atmosphere with corrections for temperature, pressure, humidity, and altitude, and Litz spin-drift approximation. Trajectory output validates against published JBM Ballistics tables to within ~1% at standard ranges.

If a number on this site looks wrong, file a bug — and we'll fix the math, not the marketing.

Sample Trajectory · 6.5 CM 140gr ELD-M
Range
Drop
Velocity
100 yd
0.0 in
2566 fps
300 yd
-7.4 in
2280 fps
600 yd
-65.8 in
1869 fps
1000 yd
-294.1 in
1402 fps
ICAO atm · 100 yd zero · no wind · sample only

Roadmap

Phase 1 now
Bolt action + 2D range
  • · .308 + 6.5 CM
  • · Trajectory chart
  • · Hold-over MOA/MIL
Phase 2 next
3D range + ammo lab
  • · First-person scope
  • · Custom loads
  • · Decibel modeling
  • · Recoil sim
Phase 3 later
More platforms
  • · AR-15 / AR-10
  • · Handguns
  • · Save / share builds
Phase 4 later
Specialty
  • · SMG · Shotgun · MG
  • · Wildcat cartridges
  • · Extreme environments

Ready when you are.

No login. No paywall. Just open the builder and start putting things together.

Open the Builder →