It is impossible to say for certain who first created the 6mm-284, since about every wildcatter worth his salt cried out with glee and quickly pounced on the .284 case as soon as it was introduced. We do know that the .284 was necked both up and down to a number of other calibers, including .224", .257", 6.5mm, .270", .308", .338", 8mm, and .358". All except the 6mm, .257", and .338" versions seem to have faded away. Like all 6mm cartridges, the 6mm-284, loaded with bullets weighing 70-87 grains, is a deadly varmint cartridge. For shooting deer sized game with this cartridge, bullets with thicker jackets of 90 to 105 grains should be used. For all around use, the Nosler 100 grain Partition is an excellent choice for this. 

This text is based on information from “Cartridges of the World”, Hodgdon reloading manual, the cartridge designer and/or own resources.