Cartridge comparison
20mm Hispano vs 20mm Vulcan
20mm Hispano and 20mm Vulcan are both in the reference; see the full spec comparison below.
Side by side
| 20mm Hispano | 20mm Vulcan | |
|---|---|---|
| Type | Autocannon | Rifle |
| Introduced | 1938 | 1956 |
| Bullet diameter | 0.7874″ | 0.7874″ |
| Case length | 4.3346″ | 4.0157″ |
| Max pressure | 18,000 psi | 65,000 psi |
| Recoil | 688.8–709.5 ft·lb | 150–200 ft·lb |
| Effective range | 600 yd | 2000 yd |
| SAAMI | Not SAAMI standardized | Military standard |
| 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.
