Cartridge comparison
.246 Purdey vs .257 Roberts +P
.246 Purdey and .257 Roberts +P are both in the reference; see the full spec comparison below.
Side by side
| .246 Purdey | .257 Roberts +P | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1921 | 1970 |
| Bullet diameter | 0.253″ | 0.257″ |
| Case length | 2.24″ | 2.2331″ |
| Max pressure | 31,900 psi | 58,000 psi |
| Recoil | 7.5 ft·lb | 9.5–11 ft·lb |
| Effective range | 400 yd | 400 yd |
| SAAMI | Not SAAMI standardized | 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.
