Jeffrey 1908 magazine bolt-action rifle .333Jeffrey
| 01. Original name | .333 Jeffery Rimless Nitro Express | |
| 02. Other official names | .333 Jeffery | |
| 03. Popular names | .333 Jeffery Rimless Nitro Express | |
| 04. Chamberings | .333 Jeffery Rimless cartridge; Bullet details: 250 & 300 grn. These have optimum sectional density for penetration | |
| 05. Designed by | W J Jeffery & Co | |
| 06. Design date | 1908 | |
| 07. In service date(s) | Kynoch ceased manufacture of the cartridge in 1950s. Kynamco (David Little) started a “boutique” production in the 1990s. | |
| 08. Adopted by | A sporting rifle adopted by the Army in 1914/15 for tackling German snipers | |
| 09. Production quantities | modest – within low hundreds | |
| 10. Mechanism | Mauser bolt action | |
| 11. Weight | Varies but say 9 to 9.5lbs | |
| 12. Mountings | ||
| 13. Practicality in action | useful medium calibre for most game in Africa | |
| 14. Comments / Other information | this cartridge gives tremendous penetration, especially with the 300 grain bullet, and for this reason was used at the front during WW1 to penetrate German sniper plates which were thicker than ours, and which .303 would not go through. See references to Hesketh-Pritchard’s tests.The cartridge uses the same case as the .404 Jeffery necked down. They were introduced at roughly the same time. A rimmed version was made for double rifles. |