The .950 JDJ (24.1×100mm in metric) is an extremely powerful rifle cartridge.
Loaded cases are approximately the length of an empty .50 BMG case. The projectiles are custom made, and usually weight about 3600 grains (230 grams), equivalent to about 8.2 ounces or over half a pound.
The bullet is fired at 670 m/s (2200 feet per second), and has a muzzle energy of 38,685 ft·lbf (52,450 J). When fired from a rifle without an efficient muzzle brake, it will deliver over 200 ft·lbf (270 J) of free recoil energy, enough to severely injure or break someone's shoulders.