First, I admit, haven't followed it at all. But thought replacing the barrel on my 77/22 with a barrel in 17 HM2 would be interesting for squirrel, the only small game I hunt anymore. Looked around for a replacement barrel, nothing, looked around for ammo, very very limited. I'm also not a computer search guru, but usually can find stuff. Guess I'll be sticking with 22LR.