I have had a crossman titan for a few years. It was working fine when I last had it out a few weeks ago. I got it out to do some pest control in my barn. At the first shot I noticed it didnt sound right and I missed what should have been an easy shot. I hung a papper target on a hay bail to readjust the scope. Poi was low left and right was fine. When I took the target down i noticed the pellets were laying on my barn floor just in front of the bail. I got an empty soda can from my colletion and fired a shot. pellet was in the can. This is a gun that about 2 weeks before would easily shoot through a full can at the same distance.What if anything can I do about this?