If one wants too make bullets for the .333Jeffery it can be done on .30US carbine brass. This brass can easely be swaged down as it almost fit perfect. I have thought a few times, to make my own .333Bullets, by fill the emty swaged down brass with lead, and swage the nose to a desired configuration. Very simpel way to make a bullet.

SA 2009: Black wilderbeast downed with .333J. Shot @ aprox 175meters with ironsights.