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Rifles, Reloading, Optics, Equipment
Gunsmithing
Dialing in bore for threading and chamber?
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<blockquote data-quote="Jeffrthehunter" data-source="post: 1364733" data-attributes="member: 98990"><p>I plan on threading and cutting the chamber in my first barrel in a few weeks. Barrel is on its way (27" Bartlein 7mm #3b 5r). I plan on using a 4 jaw independent chuck and outboard spider assembly. I have seen several videos where they use a long pin with a bushing to remove bore run-out. I get the concept of checking different positions from muzzle to confirm the barrel is true. My question is why cant I use a test indicator (I have two that have .0001" graduations) and just confirm that the rifle lands are true (less than .0002" tir) at both ends? The chamber end at the chuck would be pretty easy and the spider end I may need a long mag base to reach. Not sure why it needs anything more than that? Am i missing something?</p><p></p><p>Thanks, Jeff</p></blockquote><p></p>
[QUOTE="Jeffrthehunter, post: 1364733, member: 98990"] I plan on threading and cutting the chamber in my first barrel in a few weeks. Barrel is on its way (27" Bartlein 7mm #3b 5r). I plan on using a 4 jaw independent chuck and outboard spider assembly. I have seen several videos where they use a long pin with a bushing to remove bore run-out. I get the concept of checking different positions from muzzle to confirm the barrel is true. My question is why cant I use a test indicator (I have two that have .0001" graduations) and just confirm that the rifle lands are true (less than .0002" tir) at both ends? The chamber end at the chuck would be pretty easy and the spider end I may need a long mag base to reach. Not sure why it needs anything more than that? Am i missing something? Thanks, Jeff [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Dialing in bore for threading and chamber?
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