I am new to the M1 and have shot my new purchase only three times so far. the first day was fantastic with no issues whatsoever, shot three different brands of ammo including milsurp. Went to the range the other day and now she won't feed every time. The bolt cycles, but closes on an empty chamber, and sometimes the enbloc clop will not eject after the last round is fired and the bolt does not lock back. Any suggestions before I ship it to a gunsmith? I hate paying people to do things I should be able to do, but I don't want to be one of the customers who come into my shop with a box full of parts and says, " I thought it would be no big deal, it was just a thermostat." I also don't want to "throw parts" at it and hope for the best. Any advise would be geatly appreciated.