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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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<blockquote data-quote="Canadian Bushman" data-source="post: 1142225" data-attributes="member: 41122"><p>Ive never seen the kind of straightness and TIR you describe. </p><p></p><p>Ive done two bartliens and one krieger in the last month or two and none had a bore straighntess even close to .005".</p><p></p><p>Diametrically they were all probably within .0001 from end to end and probably within .0001 of advertised size, but nowhere near straight. </p><p></p><p>If i indicate both ends the bore always jump ropes enough to easily see with the eye. </p><p></p><p>Typically i get barrels with a TIR of about .005-.010 on the ends, but ive never seen one where the bore is straight or concentric all the way through. </p><p></p><p>I typically indicate the bore as long as i can reach from the chamber end, and let the muzzle do whatever it needs to so i can get the area where the chamber reamer will be piloted, to run as true as possible. </p><p></p><p>When i do this, typically the muzzle will run out .01-.02". </p><p></p><p>Is this not the preferred method?</p></blockquote><p></p>
[QUOTE="Canadian Bushman, post: 1142225, member: 41122"] Ive never seen the kind of straightness and TIR you describe. Ive done two bartliens and one krieger in the last month or two and none had a bore straighntess even close to .005". Diametrically they were all probably within .0001 from end to end and probably within .0001 of advertised size, but nowhere near straight. If i indicate both ends the bore always jump ropes enough to easily see with the eye. Typically i get barrels with a TIR of about .005-.010 on the ends, but ive never seen one where the bore is straight or concentric all the way through. I typically indicate the bore as long as i can reach from the chamber end, and let the muzzle do whatever it needs to so i can get the area where the chamber reamer will be piloted, to run as true as possible. When i do this, typically the muzzle will run out .01-.02". Is this not the preferred method? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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