I have the mk3 stainless target, had it for a couple years, first time out after about 250 rounds it started missing the sear or something, 3 trigger squeezes for one round fired. I took it home and put it away till I had time to work on it stripped it down , cleaned it and took it to the range, ,same thing right away, stripped it again and couldn't see anything so put it back together and noticed the cross pin that is just above/ behind the grip was in on one side and had slipped from the frame. This caused the trigger group or sear to #### sideways just enough to miss fire. I put the pin back in which seemed a bit loose for the job it does and went to the range. Once again it took about 10 mags before missfiring once again, I looked at the pin and sure enough it had slipped sideways again! I will be emailing ruger to see if they know how to fix this, not sure if the frame was punched too wide or the Pin needs to be peened. When it is working it is fun to shoot and quite accurate!