Some folks shy away from the HM2 because they are afraid ammo will too soon not be made for it. I wouldn't let that faze me a bit from buying one. I would just find out what ammo it likes and buy a big batch. If ever the ammo becomes too scarce, a fellow could then ream it to an HMR.
I really love my HMRs though (NEF & Savage 93R17 bull). Both outshoot anything I have..
Below see what I got this past week with my Savage HMR. At near 100 yards, 1 shot to the chest (Federal orange tip, V-Max) and he dropped straight down for a 'dirt nap'.