Yes, I completely stripped the rifle and cleaned it. Trust me, it's not a gunk related issue. I noted no burrs on bolt, firing pin or anywhere in the action. Like I said, its at Ruger for the second time now. The first time I sent it in to Ruger, they replaced the bolt assembly complete and performed unspecified other repairs. When I got the rifle back, I headed out to the range and got maybe 30 rounds off before it started misfiring again. This is a wierd problem too. Sometimes you might go 20 or 30 rounds and then have one misfire. Then you might get four or five in a row, and then it will go another spell and then misfire 7 or 8 times running. An this is with Winchester solids, Winchester Supremes, CCI Maxi-Mag, Federal Supremes and Federal HP, all same same. I thought it might have been a defective trigger assembly and tried to get Ruger to send me one to try before I gave up my rifle again, but they wouldn't go for that. So I sent it in a second time and now they are keeping it for 60 days or so to try and figure out the problem. I am a big Ruger fan, and think they will ultimately make it right for me, but I was just wondering if anyone else has had similar problems. The fact that they are keeping my rifle for so long makes me wonder if this is widespread or just my crappy luck.