I checked everything they all say 22 250 this is the first thing that I did after it didnt work. I played with it awhile today and just kept playing with the bolt because it seems stiff. And the bullet does go in the barrell but it sticks to the side a bit. I tried it today with no clip in put the bullet all the way in first and shut the bolt and it closed! did it 4 or 5 times and it closed everytime. So maybe whoever said there could have been a burr in the barrel may be right I cleaned the barrell with all my stuff and reemed the bolt in and out for awhile and it finally works. And now that I got it to work its pouring down rain and it got dark! But im much happier at least it works and I can use it soon! Of course when I try to reach GM they didnt answer the 4 times i called them tonight so Im glad I got it myself. But thanks to everyone for the tips and helping a fellow hunter! And no it was never hitting the scope, I had this problem with one of my other guns, come to find out I put the front scope mounts in the back and back in the front so one were longer then the other so the bolt didnt hit the scope!