Cartridge comparison
.257 Roberts +P vs .303/25 Cadet
.257 Roberts +P and .303/25 Cadet are both in the reference; see the full spec comparison below.
Side by side
| .257 Roberts +P | .303/25 Cadet | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1970 | 1906 |
| Bullet diameter | 0.257″ | 0.257″ |
| Case length | 2.2331″ | 2.22″ |
| Max pressure | 58,000 psi | 38,000 psi |
| Recoil | 9.5–11 ft·lb | 8.9–11.7 ft·lb |
| Effective range | 400 yd | 250 yd |
| SAAMI | SAAMI standardized | Not SAAMI standardized |
| CIP | Not 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.
