Okay so I'm sure everyone has had one of those range trips where you come away frustrated and wondering what the heck happened. Well today was one of those days. Trying to sight in my rifle and it was all over the target at 100 yrds. I switched from cheap ammo to some middle of the line off the shelf stuff and it didnt do much better. Roll it out to 200 yrds and the target looks just the same. Then I went back to the cheap ammo and just start popping them off and not taking the time for the barrel to cool. Once its hot all of a sudden it starts grouping. I left the range very confused. A little ways down the street I see a gun shop I have never seen before. After talking to the guys in there for a bit I pull my rifle out to show them and then we discover that the rail my scope was mounted on was loose! Well there goes 40 rounds of ammo wasted.