.242 Rimless Nitro Express
UK centerfire rifle cartridge
From Wikipedia, the free encyclopedia
The .242 Rimless Nitro Express, also known as the .242 Vickers and initially called the .242 Manton, was a rimless bottleneck centerfire rifle cartridge developed by Kynoch for J. Manton & Co of Calcutta and introduced in 1923.[1][2]
| .242 Rimless Nitro Express | ||||||||
|---|---|---|---|---|---|---|---|---|
| Type | Rifle | |||||||
| Place of origin | United Kingdom | |||||||
| Production history | ||||||||
| Designer | Kynoch | |||||||
| Designed | 1923 | |||||||
| Produced | 1923âpresent | |||||||
| Specifications | ||||||||
| Case type | Rimless, bottleneck | |||||||
| Bullet diameter | .253 in (6.4 mm) | |||||||
| Neck diameter | .281 in (7.1 mm) | |||||||
| Shoulder diameter | .405 in (10.3 mm) | |||||||
| Base diameter | .465 in (11.8 mm) | |||||||
| Rim diameter | .465 in (11.8 mm) | |||||||
| Case length | 2.38 in (60 mm) | |||||||
| Overall length | 3.2 in (81 mm) | |||||||
| Primer type | .217/54 | |||||||
| Ballistic performance | ||||||||
| ||||||||
| Source: Cartridges of the World.[1] | ||||||||
The .242 Rimless is very similar to the .243 Winchester in performance, although the cartridge is significantly longer. It fired a 100 gr projectile at 2800 fps.[1][2]
| Cartridge | Bullet weight | Muzzle velocity | Muzzle energy |
|---|---|---|---|
| .242 Rimless Nitro Express | 100 gr (6.5 g) | 2,800 ft/s (850 m/s) | 1,740 ftâ lbf (2,360 J) |
| .240 Apex | 100 gr (6.5 g) | 2,900 ft/s (880 m/s) | 1,865 ftâ lbf (2,529 J) |
| .240 Weatherby Magnum | 100 gr (6.5 g) | 3,406 ft/s (1,038 m/s) | 2,576 ftâ lbf (3,493 J) |
| .243 Winchester | 100 gr (6.5 g) | 2,960 ft/s (900 m/s) | 1,945 ftâ lbf (2,637 J) |
| .243 Winchester Super Short Magnum | 100 gr (6.5 g) | 3,110 ft/s (950 m/s) | 2,147 ftâ lbf (2,911 J) |
| .244 H&H Magnum | 100 gr (6.5 g) | 3,500 ft/s (1,100 m/s) | 2,720 ftâ lbf (3,690 J) |
| .246 Purdey | 100 gr (6.5 g) | 2,950 ft/s (900 m/s) | 1,930 ftâ lbf (2,620 J) |
| 6 mm Lee Navy | 100 gr (6.5 g) | 2,680 ft/s (820 m/s) | 1,595 ftâ lbf (2,163 J) |
| 6 mm Remington | 100 gr (6.5 g) | 3,100 ft/s (940 m/s) | 2,133 ftâ lbf (2,892 J) |
