Cartridge comparison
.375/303 Westley Richards Accelerated Express vs 8x52mmR Siamese
.375/303 Westley Richards Accelerated Express and 8x52mmR Siamese are both in the reference; see the full spec comparison below.
Side by side
| .375/303 Westley Richards Accelerated Express | 8x52mmR Siamese | |
|---|---|---|
| Type | Rifle | Rifle |
| Introduced | 1905 | 1923 |
| Bullet diameter | 0.311″ | 0.321″ |
| Case length | 2.5″ | 2.04″ |
| Max pressure | 38,000 psi | 45,000 psi |
| Recoil | 19.4–22.3 ft·lb | 13.2–15.2 ft·lb |
| Effective range | 300 yd | 500 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.
