I have not gotten caught up in the "new cartridge" craze though I did have a Model 70 in 300 WSM for a short period of time. I frankly cannot see the draw to these expensive, relatively difficult to find cartridges. I have the old standby's ... 30/06 Spr., 308 Win., 300 Win. Mag. That is all I need ... though I do have rifles in 358 Win., 6.5x55 SE, and 444 Marlin.