Cartridge comparison
.309 JDJ vs 7mm JDJ
.309 JDJ and 7mm JDJ are both in the reference; see the full spec comparison below.
Side by side
| .309 JDJ | 7mm JDJ | |
|---|---|---|
| Type | Pistol | Pistol |
| Introduced | 1979 | 1978 |
| Bullet diameter | 0.308″ | 0.284″ |
| Case length | 2.2252″ | 1.9″ |
| Max pressure | 42,000 psi | 42,000 psi |
| Effective range | 250 yd | 200 yd |
Highlighted cells hold the clear edge where both sides have a number. Every figure is a range maximum from the reference; typical loads run lower.