Commercialized in 1908, featuring a 225 gr bullet at a nominal 2600 fps.  Since bullets are of the standard 0.358″ diameter, loading this cartridge is easy.  Providing performance in the same category as the 35 Whelan, the 350 Rigby is suitable for all North American game.  Pricing is per 20 cases and the shipping weight is 350 g/20 cases.