20x138mmB
1930 · Waffenfabrik Solothurn / Rheinmetall · 2 firearms in catalog
Also known as: 20mm Long Solothurn, 20x138B, 20mm Solothurn Long
Cartridge specifications
| Bullet Diameter | 20 mm (0.787") |
| Neck Diameter | 21.5 mm (0.846") |
| Base Diameter | 27.2 mm (1.071") |
| Case Length | 138 mm (5.433") |
| Overall Length | 203 mm (7.992") |
| Typical Bullet Weight | 148 g (2284 gr) |
| Typical Muzzle Velocity | 800 m/s (2625 fps) |
| Typical Muzzle Energy | 47360 J (34931 ft·lbf) |
| Primer Type | Centerfire |
| Cartridge Type | Belted |
| Introduced | 1930 |
Firearms chambered in 20x138mmB
- Lahti L-39 — Valtion Kivääritehdas (VKT) · Sniper Rifle · 1939
- Solothurn S-18/1000 — Waffenfabrik Solothurn AG · Sniper Rifle · 1938