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Hunting
The Basics, Starting Out
a new rifle
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<blockquote data-quote="AJ300MAG" data-source="post: 54807" data-attributes="member: 444"><p>Blueprinting the action means to make it square and eliminate the runout from the bolt axis. The rear surface of the lugs are trued square to the bolt, then the bearing surface in the action is trued to the bolt bore. The front of the action is cut square to the bolt bore, and the barrel threads are recut so that they are concentric to the bolt bore (only if a custom barrel is being added). If stock barrel is being used, the barrel shoulder will be recut to true it square to the bore axis. They can go as far as to ream the bolt bore on the action (it may be out of round and have a tapered hole) and then sleeve the bolt. Depends on how much money you have to spend. Your trying to eliminate tolerance stack-up and make everything dead nuts true. Say the front of the action is .004" out of square, the barrel shoulder is .004" out also. They might cancel each other out, then again, think of where the barrel is pointing if the index if at worst case (.008"). Hope this helps <img src="http://images/icons/shocked.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="AJ300MAG, post: 54807, member: 444"] Blueprinting the action means to make it square and eliminate the runout from the bolt axis. The rear surface of the lugs are trued square to the bolt, then the bearing surface in the action is trued to the bolt bore. The front of the action is cut square to the bolt bore, and the barrel threads are recut so that they are concentric to the bolt bore (only if a custom barrel is being added). If stock barrel is being used, the barrel shoulder will be recut to true it square to the bore axis. They can go as far as to ream the bolt bore on the action (it may be out of round and have a tapered hole) and then sleeve the bolt. Depends on how much money you have to spend. Your trying to eliminate tolerance stack-up and make everything dead nuts true. Say the front of the action is .004" out of square, the barrel shoulder is .004" out also. They might cancel each other out, then again, think of where the barrel is pointing if the index if at worst case (.008"). Hope this helps [img]images/icons/shocked.gif[/img] [/QUOTE]
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The Basics, Starting Out
a new rifle
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