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Rifles, Reloading, Optics, Equipment
Reloading
TIGHTEN PRIMER POCKETS, here's how.
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<blockquote data-quote="Pdvdh" data-source="post: 2389158" data-attributes="member: 4191"><p>The problem with .20 caliber case necks, is the bolt, or a rod or dowel, can't be any larger in diameter than ~ .205", or it won't pass down the ID of the .20 caliber case neck.</p><p></p><p>A .200" bolt is barely larger in diameter than the small rifle primer pocket. So when you hammer on it against the inner flash hole side of the casing, it will blow right down into the primer pocket and flare out and destroy the primer pocket.</p><p>The diameter of any bolt hammered against the inner base of the casing has to be sufficiently large, in comparison to the diameter of the flash hole, so that the bolt won't blow down into the flash hole. The perimeter of the bolt has to contact solid brass case head surrounding the hollow primer pocket. Or the primer pocket will be flared out, distorted, ruined. The flash hole will end up being driven all the back to the case head surface.</p><p></p><p>The ball bearing, grade 8 bolt, hammer method cannot be employed with success unless the case neck ID is large enough to pass a bolt much larger than the primer pocket diameter. Enough larger than the primer pocket diameter so that the bolt won't get driven and blown down into the primer pocket.</p></blockquote><p></p>
[QUOTE="Pdvdh, post: 2389158, member: 4191"] The problem with .20 caliber case necks, is the bolt, or a rod or dowel, can't be any larger in diameter than ~ .205", or it won't pass down the ID of the .20 caliber case neck. A .200" bolt is barely larger in diameter than the small rifle primer pocket. So when you hammer on it against the inner flash hole side of the casing, it will blow right down into the primer pocket and flare out and destroy the primer pocket. The diameter of any bolt hammered against the inner base of the casing has to be sufficiently large, in comparison to the diameter of the flash hole, so that the bolt won't blow down into the flash hole. The perimeter of the bolt has to contact solid brass case head surrounding the hollow primer pocket. Or the primer pocket will be flared out, distorted, ruined. The flash hole will end up being driven all the back to the case head surface. The ball bearing, grade 8 bolt, hammer method cannot be employed with success unless the case neck ID is large enough to pass a bolt much larger than the primer pocket diameter. Enough larger than the primer pocket diameter so that the bolt won't get driven and blown down into the primer pocket. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
TIGHTEN PRIMER POCKETS, here's how.
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