Cartridge comparison
.255 Rook vs .297/250 Rook
.255 Rook and .297/250 Rook are both in the reference; see the full spec comparison below.
Side by side
| .255 Rook | .297/250 Rook | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1880 | 1880 |
| Bullet diameter | 0.255″ | 0.2535″ |
| Case length | 1.15″ | 0.8122″ |
| Max pressure | 18,000 psi | 18,000 psi |
| Recoil | 0.5–0.51 ft·lb | 0.37 ft·lb |
| Effective range | 100 yd | 100 yd |
| SAAMI | Not SAAMI standardized | Not SAAMI standardized |
| CIP | Not standardized | Not standardized |
| Obsolete | Obsolete | Obsolete |
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.
