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Rifles, Reloading, Optics, Equipment
Gunsmithing
Scarring Across the Chamber Throat a Problem?
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<blockquote data-quote="Alex Wheeler" data-source="post: 2210236" data-attributes="member: 101859"><p>If all 5 grooves look similar the smith did his job. Either the reamers freebore diameter is small or the groove diameter is big. But not necessarily out of spec. A groove spec is -.000 + .0005" and reamer freebore diameter is -.000 +.0005". Bottom line, this is very common and it will not cause an issue. Your seeing the lapped finish in the freebore diameter, the reamer was not big enough to totally clean up the groove. This is most likely going to be a "fast" barrel. Those scratches your seeing would measure in the millionths, not tenths. I play with this stuff, what your seeing is not a problem in any way.</p></blockquote><p></p>
[QUOTE="Alex Wheeler, post: 2210236, member: 101859"] If all 5 grooves look similar the smith did his job. Either the reamers freebore diameter is small or the groove diameter is big. But not necessarily out of spec. A groove spec is -.000 + .0005" and reamer freebore diameter is -.000 +.0005". Bottom line, this is very common and it will not cause an issue. Your seeing the lapped finish in the freebore diameter, the reamer was not big enough to totally clean up the groove. This is most likely going to be a "fast" barrel. Those scratches your seeing would measure in the millionths, not tenths. I play with this stuff, what your seeing is not a problem in any way. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Scarring Across the Chamber Throat a Problem?
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