I bought one of these about 1 year ago & it worked great until now. Now, after I shoot the first round, the clip falls out the bottom and the second round jams before it enters the chamber. The clip is pushed in solidly and doesn't seem to be worn out at all. I've only shot a total of about 500 rounds through this pistol. Anybody else out there have experience with this pistol? Any ideas as to what may be wrong?