The .17 HM2 IMO is a great little cartridge.....but certainly not very popular. I bought one in a Savage bolt rifle with a heavy barrel.....it's a fine shooter. Another one I built from a 1915 Stevens favorite. It's a great little rifle but a bit too much for small game that is headed for the stew pot.
I did have concerns about ammo supplies so I stocked up a lifetime supply. All tolled about 7,000 rounds. I'm having trouble with photo hosting but will post photos when I can.
