The 284 was a cool shell made to fit in short actions. Winchester brought it out so people could get 270 performance on game from a lever action, their M88, and then also from their M100 auto loading rifle in 1963.
In any long action however it's an expensive way to get what the 270 and 280 both do, (and do with a bit faster velocities), so unless it's used in a short action it has little reason to exist in my opinion.
Some will make a lot of noise about a few FPS, mostly because of wanting to justify their expenditure. But if you use a long action and you were concerned about a few FPS in a 7MM bore it's hard for me to justify spending a lot of money when you could simply get a 280 or a 7MM Mag for that matter.
The 284 was cool and filled the bill for what it was designed for. Short actions, and specifically lever actions.
Last edited by szihn; 01/12/22.
