Cartridge comparison
.243 Winchester vs 6mm International
.243 Winchester and 6mm International are both in the reference; see the full spec comparison below.
Side by side
| .243 Winchester | 6mm International | |
|---|---|---|
| Type | Rifle | Wildcat |
| Introduced | 1955 | 1957 |
| Bullet diameter | 0.243″ | 0.243″ |
| Case length | 2.0449″ | 1.9118″ |
| Max pressure | 60,000 psi | — |
| Recoil | 8–12 ft·lb | — |
| Effective range | 400 yd | 300 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.
Case profiles, to scale
Drawn to the same scale, so the proportions are true. Physical size varies with your screen.