Lindcott Armory Compare / .309 JDJ vs 7mm JDJ
Cartridge comparison
.309 JDJ vs 7mm JDJ
.309 JDJ is faster (2,200 vs 1,950 fps); .309 JDJ carries more energy (1,934 vs 1,300 ft·lb).
.309 JDJ →Representative trajectory · 100 yd zero0–500 yd Open in Ballistic Compare ↗
7mm JDJ →Representative trajectory · 100 yd zero0–500 yd Open in Ballistic Compare ↗
| .309 JDJ | 7mm JDJ | |
|---|---|---|
| Type | Pistol | Pistol |
| Introduced | 1979 | 1978 |
| Bullet ⌀ | 0.308″ | 0.284″ |
| Case length | 2.225″ | 2.225″ |
| Velocity | 1,800–2,200 fps | 1,600–1,950 fps |
| Energy | 1,081–1,934 ft·lb | 682–1,300 ft·lb |
| Max pressure | 42,000 psi | 42,000 psi |
| Recoil | — | — |
| Eff. range | 150 yd | 100 yd |
FAQs
- Is .309 JDJ faster than 7mm JDJ?
- .309 JDJ is faster — up to 2,200 fps versus 1,950 fps.
- Does .309 JDJ hit harder than 7mm JDJ?
- .309 JDJ carries more muzzle energy (1,934 vs 1,300 ft·lb).