Been thinking about getting a . 17 HMR rifle. What is the difference between the HMR and HM2? My target would be paper, ground hogs and wild cats. Out to 100 yards will the . 17 have enough power? Also thought of a 22mag, but the . 17 seems to be a flatter shooter. I read someone talking about buying one for around $150. 00, the picture had a heavy barrel. Anybody know (brand) would be selling in that range?