Having owned 3 17HMR's(Cooper 57LVT, 2 Marlin's) I can tell you they do shoot really well. Shooting them against a regular now-a-day cheaper 22, I would have to give them the edge by quite a bit. Shooting them against a full blown match gun with good Eley ammo or SK Pistol Match, the 17's are gonna take a whippin. My Suhl will easily shoot groups consistantly a lot smaller than any 17HMR I have owned including the Cooper. At 50yds, it wouldn't even be close. Anyone who has a factory 17HMR that they say will shoot like a laser probably hasn't never owned a 22lr custom bench gun. I do believe you can make a 17HMR shoot even better by getting one like Joe Besche and soup it up on a custom action like he did. At 100yds, on calm days with little wind, I believe a good match gun would give a great shooting 17HMR all it would want. But on typical windier days, at 100yds, the 17's rule. But what kills the 17HMR in what I call accurate consistancy is the availability of what I call very good quality ammo. The 22's are where it's at for the super match grade ammo.
Brad