I don't know hardly anyone that buys factory ammo,so your post means very little to anyone that actually shoots their rifles much because 90% of them load their own ammo.Below is from Sportsman's Warehouse. # of different rifles they carry.
6.5 PRC is chambered the 5th most variety wise for what they stock. Think about that. How long have companies made 6.5 PRC rifles? Look a 6.5 CM, it has over twice the flavors as the 270 win.
6.5-284 is just a niche rifle..... nobody but reloaders use it for hunting. It isn't displacing 6.5 CM, 270, 7RM, 280ai, or 7-08 sales like the 6.5 PRC is.
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Calling the 6.5-284 a niche round just shows how little you actually know,as well as the 6.5-06. You'd be quite surprised at the number of people that actually shoot them,and they will be around a lot longer than the 6.5 PRC.
Every year,there are new cartridges introduced to the market to boost new sales. Some are good,some fall flat. The ones that make it always offer the shooter something better than what they currently shoot,but the 6.5 PRC really doesn't do anything better than the 6.5-284 or the 6.5-06 other than coming in more varieties of factory ammo which doesn't mean anything to someone that reloads.