The sights are rotated to the right?? Is the barrel tight? Do the cases have any marks, flattening of the primers etc. If the barrel is tight and the sights are rotated to the right and not just bent then the barrel needs to be screwed further into the action to bring the sights to the top of the barrel. A job for a smith with a lathe and the proper tools. Damaged sights are not a big job. Removing a barrel and altering to allow it to screw into the action a bit further is quite a job. Better let a smith check it out and give you an estimate. When you say it can't hit a target beyond 20 yards what is the group size we're talking about? or does it simply NOT HIT the target at 20+ yards. A bit more info may help us clear this up.