I have a Ruger Mark III Hunter and have questions, I believe Ruger owners can help me with. I have a question regarding Mark III Hunter, racking. My son cleaned his Mark III Hunter and after reassembling, bolt will not rack, what happens, inserting the magazine, when I racked it, bolt lockes open, did not return, I had to release the bolt with bolt release, only then did it fire, upon racking again, it locks each time. Upon assemblying, what could my son have done to cause this? Thanks, I hope I explained the situation.