OK, here is where it gets goofy. I took the gun apart to see if I could find anything noticeably wrong with the trigger. Looked OK, but on a whim, before I put the gun back together, I put the bolt back in and tried to pull the trigger. Worked fine. Cocked it again, put the safety on, pulled the trigger, safety worked fine. Took safety off, pulled trigger, gun fired fine. Repeated several times to be sure. Worked great.
Put it all back together, and trigger won't pull all the way to fire the gun.
?????????
Something weird about putting it all back into the stock, I guess, but what?