I have a smith 500 serial number 167 I've had it for a few years and I've put a little over 3500 rounds through it I was wondering if anyone else with a x-frame revolver with this many rounds through it has experienced any problems. The one problem I've run accrossed is the hammer spring is not setting off the primers. I turned the adjustment screw all the way in and still one out of ten rounds the dud just has to be hit again and it goes off, I've tryed different primers so that is ruled out. Any info would be great.