| .577/500 Nitro Express | |
| Origin: | United Kingdom |
| Type: | Rifle |
| Case Type: | Rimmed, bottleneck |
| Bullet: | .508 |
| Neck: | .526 |
| Shoulder: | .585 |
| Base: | .645 |
| Rim Dia: | .717 |
| Rim Thick: | .055 |
| Case Length: | 3.13 |
| Length: | 3.74 |
| Rifling: | 1:16 |
| Primer: | .251 (6.38 mm) Berdan (Kynoch #31A) |
| Bw1: | 440 |
| Vel1: | 1725 |
| En1: | 2920 |
| Vel2: | 1500 |
| En2: | 2320 |
| Balsrc: | "Cartridges of the World" [1] |
The .577/500 -inch Nitro Express is a British centerfire fire rifle cartridge.
The .577/500 NE was developed by loading a -inch variant of the .577/500 Black Powder Express with smokeless cordite. The latter was developed by necking down the .577 Black Powder Express to .508".[2]
Whilst very similar to the .577/500 No 2 Black Powder Express the two are not interchangeable.[1]
Despite being a similar size, the .577/500 NE is not nearly as powerful as the .500 Nitro Express and is not suitable for such thick-skinned game as elephant. Like the .500 Black Powder Express, the .577/500 NE was never highly regarded for hunting in Africa, yet it was popular in India.[1]
Moderately popular in its day, the round has long since ceased to be offered commercially.