Cartridge comparison
.25-20 Winchester vs .255 Rook
.25-20 Winchester and .255 Rook are both in the reference; see the full spec comparison below.
Side by side
| .25-20 Winchester | .255 Rook | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1895 | 1880 |
| Bullet diameter | 0.2579″ | 0.255″ |
| Case length | 1.3299″ | 1.15″ |
| Max pressure | 28,000 psi | 18,000 psi |
| Recoil | 0.94–1.6 ft·lb | 0.5–0.51 ft·lb |
| Effective range | 125 yd | 100 yd |
| SAAMI | SAAMI standardized | Not SAAMI standardized |
| CIP | CIP standardized | Not standardized |
| 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.
