.950 JDJ cases are approximately 70 mm in length, and are based on a 20x110mm case shortened and necked up to accept the .950 in (24.1 mm) bullet. Projectiles are custom-made and most commonly weigh 3,600 grains (230 g) which is 8.2 oz. or over half a pound. This piece is pretty big. 2x2x6.