Please straighten me out. I have a long action with a .473 bolt head. To change to a 223, exactly what do I need? Will a short action bolt head work? Do I need the extra baffel to shorten the bolt throw? I keep hearing about special extractors, firing pins , etc. What do I really need? Where is the best place to get them? Is it as simple to change a bolt head as it is to change barrels? Is a complete bolt the best/easiest way to go? A new bolt would negate my T&T'ed action. HELP

Bill