I was at the range with my H&R Ultra Slug 20 ga and started to experience random misfires. It happened with Hornady SST, Federal, and Remington. I thought it was bad ammo, but I was able to get them to fire when I tried a second time. Took it to the local gunsmith and he said it sounded like a bad hammer spring. When he got it apart, he said it looked like a brand new gun. The spring was fine, but it was dry as a bone. He said it look like it left the factory with out a bit of lube. He lubed it and tested it and it worked fine..Anyone else out there having similar issues. I call H&R and they said to send it back and they would take a look. It would be free it they determined it to be a warranty issue. I'm worried that this gun will not fire when I need it most....