I mounted the scope on a one peice AI mount. The mount has 18 MOA built into it. The scope mounted perfect. I took it to the range and zeroed it in. After I set the top turret to the one. I could not do a complete turn of the elevation. The elevation turret is marked 1-13 in cm clicks. It tops out at about 11. Is this the range of the scope? And no I did not put the mount on backwards. Has anyone ran into this with these scopes?