I have a Rem 722 that is in a several year process becoming a 6BR. Not much of a problem there. The problem is that the bolt has become misplaced. No need to ask........how or why. What are the choices? Is a 722 bolt different than a 700 SA bolt. If I go to PT&G, what about a bolt head size for the BR cartridge? What about extractor? I know nothing about this end of things and was doing well with DIY until there was no bolt.