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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Teach me to lap barrels (PLEASE)!
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<blockquote data-quote="Coyboy" data-source="post: 739263" data-attributes="member: 3733"><p>The only thing I will add to JE comment is that you need much coarser grit than 1000.</p><p>most barrel makers lap with a specific abrasive(I don't recall which one) but it is between 120 and 150 grit. The abrasive embeds in the softer lead and this is why the process works, as the barrel is lapped this abrasive breaks down and will actually produce a finer finish but no where near what 1000 grit would polish.</p><p></p><p>I have been given this abrasive and used to lap at least a dozen barrels, a good lube added to the bore aids in the process, and mixing the abrasive with oil and applying to the lead lap also helps hold the abrasive until you pull the lap into the bore.</p><p>Within about 3-5 strokes you can feel the lap slide freer as the abrasive works into the lead and fractures to smaller grit.</p></blockquote><p></p>
[QUOTE="Coyboy, post: 739263, member: 3733"] The only thing I will add to JE comment is that you need much coarser grit than 1000. most barrel makers lap with a specific abrasive(I don't recall which one) but it is between 120 and 150 grit. The abrasive embeds in the softer lead and this is why the process works, as the barrel is lapped this abrasive breaks down and will actually produce a finer finish but no where near what 1000 grit would polish. I have been given this abrasive and used to lap at least a dozen barrels, a good lube added to the bore aids in the process, and mixing the abrasive with oil and applying to the lead lap also helps hold the abrasive until you pull the lap into the bore. Within about 3-5 strokes you can feel the lap slide freer as the abrasive works into the lead and fractures to smaller grit. [/QUOTE]
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Teach me to lap barrels (PLEASE)!
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