Reloaders' Corner
Build better loads. Read the data. Stay safe at the bench.
Ballistic Terms — Plain English
The speed of the bullet measured in feet per second, typically captured at the muzzle or a fixed distance.
Mean velocity across a string of shots — the benchmark for load consistency.
Statistical measure of velocity variation. Lower SD = more consistent load. Sub-10 fps is excellent.
Difference between the fastest and slowest shot in the string. Indicates worst-case variance.
Bullet weight (grains) × velocity (fps) ÷ 1000. Used in competition classification.
Kinetic energy delivered downrange, measured in foot-pounds. Function of mass and velocity squared.
Doppler Radar Testing
Unlike a single-point chronograph, Doppler radar tracks the bullet through its entire trajectory — giving us velocity decay, drag coefficient, and downrange behavior. Every Fire Ammo lot is verified with radar-grade data before it leaves the bench.
- ▸Continuous velocity tracking from muzzle to target
- ▸Drag coefficient (BC) verification
- ▸Downrange energy retention modeling
- ▸Repeatable, lot-traceable measurements
| Distance | Velocity | Energy |
|---|---|---|
| Muzzle | 2,950 fps | 1,199 ft-lb |
| 100 yds | 2,700 fps | 1,003 ft-lb |
| 300 yds | 2,240 fps | 691 ft-lb |
| 500 yds | 1,830 fps | 461 ft-lb |
| 700 yds | 1,470 fps | 297 ft-lb |
Safety Disclaimer
Reloading involves inherent risks. The data, charts, and recipes referenced on this site are for educational purposes only. Always consult current published load data from reputable powder and bullet manufacturers. Start at the minimum charge, work up slowly, and inspect every component. Fire Ammo, LLC assumes no liability for use or misuse of this information.