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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Button or cut?
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<blockquote data-quote="Trickymissfit" data-source="post: 513308" data-attributes="member: 25383"><p>a button going thru a bore forming the rifeling induces a compressive stress that should be very even assuming the bore is round and the same size from end to end. A compressive stress is much different than stresses that we normally think of, as it actually induces a slight rigidity to the surface. The micro should also come out slightly better with a button, but that also creates a problem as well. That super smooth burnished surface does not lube quite as well, and will create more friction in metal to metal contact. All that aside the cut rifeling is only as good as the indexing process, and there will always be some backlash in the mechanism. Yet a button rifeling job is only as good as the button itself and the way it's pulled or pushed thru the bore. It also will have a slight amount of backlash in the mechanism. I think both systems depend greatly on the quality of the drill and ream job; let alone the lapping process if done prior to rifeling. I doubt that 99% of us would ever know the difference between barrels unless they were told.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 513308, member: 25383"] a button going thru a bore forming the rifeling induces a compressive stress that should be very even assuming the bore is round and the same size from end to end. A compressive stress is much different than stresses that we normally think of, as it actually induces a slight rigidity to the surface. The micro should also come out slightly better with a button, but that also creates a problem as well. That super smooth burnished surface does not lube quite as well, and will create more friction in metal to metal contact. All that aside the cut rifeling is only as good as the indexing process, and there will always be some backlash in the mechanism. Yet a button rifeling job is only as good as the button itself and the way it's pulled or pushed thru the bore. It also will have a slight amount of backlash in the mechanism. I think both systems depend greatly on the quality of the drill and ream job; let alone the lapping process if done prior to rifeling. I doubt that 99% of us would ever know the difference between barrels unless they were told. gary [/QUOTE]
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