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Rifles, Reloading, Optics, Equipment
Gunsmithing
Shallow action threads?
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<blockquote data-quote="Hired Gun" data-source="post: 1125668" data-attributes="member: 1290"><p>Using your headspace gauge, what is the difference in headspace between those two barrels measuring from the chamber end of the barrel to the base of the gauge using a good depth mic? No calipers for this one. </p><p> </p><p>I'm betting the new barrel is more than a few thou deeper. </p><p> </p><p>No barrel threads should ever be an interference fit. That could cause them to distort and gall. This is not a self locking joint like a pinion nut on a car. The less stress the better it will work. Nice evenly loaded threads is what you are after.</p><p> </p><p>When fitting a barrel I draw up an action print and a tennon print including the calculated head space. On a hunting or tactical rifle I keep the end of the barrel .010" off of the front of the bolt lugs and the bolt nose .010" off of the bolt nose recess. The bolt nose relief should be about .010" bigger that your bolt nose for the same field clearance. If any of these touch accuracy can suffer.</p><p> </p><p>Using a nut on a Remington could leave you a bit tight. One unburned grain of powder or one loose cleaning brush bristle will shut down your rifle if it's too tight.</p></blockquote><p></p>
[QUOTE="Hired Gun, post: 1125668, member: 1290"] Using your headspace gauge, what is the difference in headspace between those two barrels measuring from the chamber end of the barrel to the base of the gauge using a good depth mic? No calipers for this one. I'm betting the new barrel is more than a few thou deeper. No barrel threads should ever be an interference fit. That could cause them to distort and gall. This is not a self locking joint like a pinion nut on a car. The less stress the better it will work. Nice evenly loaded threads is what you are after. When fitting a barrel I draw up an action print and a tennon print including the calculated head space. On a hunting or tactical rifle I keep the end of the barrel .010" off of the front of the bolt lugs and the bolt nose .010" off of the bolt nose recess. The bolt nose relief should be about .010" bigger that your bolt nose for the same field clearance. If any of these touch accuracy can suffer. Using a nut on a Remington could leave you a bit tight. One unburned grain of powder or one loose cleaning brush bristle will shut down your rifle if it's too tight. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Shallow action threads?
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