I think the WMR is a dubious round, unless you have a particular hunting application, like rabbits, or you specifically want a quieter round. For small varmints, the .17 HMR shoots flatter and kills just as dead. And you can get some hot .22LR rounds that are approach WMR velocity and energy, for occasional use.
WMR is just plain too expensive for what it is, especially since you can't reload it, IMHO.
For the same price as WMR, you can get .223 plinking ammo; for a little more you can get name-brand varmint .223 ammo. .22-250, etc., are more expensive, but centerfires are reloadable. .22 centerfires are more suited to coyotes, and certainly will give you a lot more range. And in between, they can be incredibly accurate if you want to shoot beer cans at 400 yards. Furthermore, some state laws limit what you can hunt with any rimfire round.
That said, the new Savage with the Accu-trigger is a helluva rimfire rifle for cheap, no matter which caliber you're considering!