RE: 17. HMR
I have shot mine out to 300 yards. It only works on calm days.LOL We shot some 20oz plastic bottles of water, and it looked impressive. I personally would not shoot at a critter that far. But 200 yards is certainly do-able. I shot a possum last week at 175 yards, and it was VERY effective. It didn't gomore than 6" once hit. I use a BSA Sweet 17 scope, and it has a bullet drop compensator built into the elevation turret. Just click in the distance, and shoot. Good luck