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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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<blockquote data-quote="IdahoCTD" data-source="post: 1142425" data-attributes="member: 13110"><p>Have you tried indicating in the barrel 2+" when both ends are running true? You might be surprised how not straight it is. They are suppose to be turned on centers so the ends are usually good but the middle can be a jump rope. I cut one barrel from a 27" blank to a 22" finish and the bore was out of center .030" in 5". I dialed in the chamber end in and the bore had .156" of total travel or .078" of run out. It still shot good but that tells you how not straight some barrels are.</p></blockquote><p></p>
[QUOTE="IdahoCTD, post: 1142425, member: 13110"] Have you tried indicating in the barrel 2+" when both ends are running true? You might be surprised how not straight it is. They are suppose to be turned on centers so the ends are usually good but the middle can be a jump rope. I cut one barrel from a 27" blank to a 22" finish and the bore was out of center .030" in 5". I dialed in the chamber end in and the bore had .156" of total travel or .078" of run out. It still shot good but that tells you how not straight some barrels are. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Why dial a rifle bore within .0001"
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