I purchased a P22 camo used at a gun show a little more than a year ago. As a newbie to Walthers, and shooting in general, I was told that the gun was a no-brainer. When I got the gun home, I cleaned it (it was filthy) inspected it with a trusted friend, and took it to the range...where it jammed about every third round. I used Federal 40 grain solids, and had a failure to eject between every second and third round. I got some advice to lube it up more, lube the mags, cleaned it again, have the springs checked out (they do). It is still jamming every third round. What's my malfunction? Is it me or my weapon?