| 11×58mmR | |
| Origin: | Austria-Hungary |
| Type: | Rifle |
| Service: | 1877–1918 |
| Used By: | Austria-Hungary |
| Wars: | World War I (limited use) |
| Design Date: | 1877 |
| Is Si Specs: | yes |
| Parent: | 11.15×42mmR |
| Case Type: | Rimmed, bottleneck |
| Bullet: | 11.2 |
| Neck: | 11.84 |
| Shoulder: | 13.61 |
| Base: | 13.84 |
| Rim Dia: | 15.67 |
| Case Length: | 57.66 |
| Length: | 76.71 |
| Is Si Ballistics: | yes |
The 11×58mmR M1877, 11mm Werndl or 11.15×58mmR is a black powder cartridge used in the M1867 Werndl–Holub rifle as well as the Mannlicher M1886 rifle.[1]