| .600/577 Rewa | |
| Origin: | England |
| Type: | Rifle |
| Designer: | Holland & Holland |
| Design Date: | 1929 |
| Production Date: | 1929–1957 |
| Parent: | .600 Nitro Express |
| Case Type: | Rimmed, bottleneck |
| Bullet: | .584 |
| Neck: | .613 |
| Shoulder: | .646 |
| Base: | .697 |
| Rim Dia: | .805 |
| Case Length: | 3 |
| Length: | 3.83 |
| Bw1: | 750 |
| Vel1: | 2150 |
| En1: | 7697 |
| Balsrc: | The Spanish Association of Cartridge Collectors &<br/>Czech Moravian Society of Collectors of Cartridges[1] |
The .600/577 Rewa, also known as the .600/577 Rewa Nitro Express, Holland's .600/577 and the .577 Rewa, is an obsolete big bore rifle cartridge.
The .600/577 Rewa was developed and introduced by Holland & Holland in 1929 by a special order for Martand Singh, Maharaja of Rewa.
The .600/577 Rewa is a rimmed, bottlenecked centerfire rifle cartridge. The .600/577 Rewa is derived from the .600 Nitro Express necked down to accept the calibre bullet of the .577 Nitro Express. The .600/577 Rewa fires a bullet driven by of cordite.
Always rare, the .600/577 Rewa was produced by Holland & Holland until 1957, although it can still be purchased from Kynoch.