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Rifles, Reloading, Optics, Equipment
Reloading
Making a datum line gauge
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<blockquote data-quote="Trickymissfit" data-source="post: 1387295" data-attributes="member: 25383"><p>goto a bearing shop (like Dixie, Motion, or Bearing Inc.) and buy a 12mm inner race for a needle bearing. Just make sure it's longer than the neck length. The are ground with pretty sharp corners and are parallel at the ends. Rest is clearance , so doesn't matter much. Then you just measure over the bushing and the base of the case. Been doing this for years.</p><p> If you just have to use a Hornaday gauge, then you'll need to turn one out of steel or aluminum. The inner race is more accurate.</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 1387295, member: 25383"] goto a bearing shop (like Dixie, Motion, or Bearing Inc.) and buy a 12mm inner race for a needle bearing. Just make sure it's longer than the neck length. The are ground with pretty sharp corners and are parallel at the ends. Rest is clearance , so doesn't matter much. Then you just measure over the bushing and the base of the case. Been doing this for years. If you just have to use a Hornaday gauge, then you'll need to turn one out of steel or aluminum. The inner race is more accurate. gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Making a datum line gauge
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