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Rifles, Reloading, Optics, Equipment
Reloading
Weird Issue with Run out
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<blockquote data-quote="Trickymissfit" data-source="post: 458374" data-attributes="member: 25383"><p>that's something that most guys using Forster sizers do. Sometimes you'll pick up a thousandth of an inch, and other times it's only a couple tenths. If you have a bump or a burr on the case head or where it contacts the bolster plate on the press it triangulates into significant numbers. Still if you seeing .0015" TIR you doing something right. </p><p> </p><p> If your using the dial indicator that came with the Sinclair gauge you maybe better or worse than your readings show. That indicator has 10% lag built into it! But is usable if you start you readings at the low point, and constantly gain in the reading. If the indicator starts in one place and goes plus, and then minus; the error comes to play. Try (borrow one) a wand type indicator to do a compairison check. Who knows you might be better than you thought! I often recommend to folks that they seek out a B&S Best Test or better yet an Interrapid with .0005" readings. These are zero lag indicators that will give you a much more accurate reading. One last thing to check is to see exactly what reading you are showing just ahead of the base of the case. If you are showing error, I suggest you mark the high spot and rotate the case 180 degrees. If the error stays put in the same spot, I'd send the gauge back for replacement (the error should rotate 180 degrees when you move the case 180 degrees). ( some folks as expected will not like reading this)</p><p>gary</p></blockquote><p></p>
[QUOTE="Trickymissfit, post: 458374, member: 25383"] that's something that most guys using Forster sizers do. Sometimes you'll pick up a thousandth of an inch, and other times it's only a couple tenths. If you have a bump or a burr on the case head or where it contacts the bolster plate on the press it triangulates into significant numbers. Still if you seeing .0015" TIR you doing something right. If your using the dial indicator that came with the Sinclair gauge you maybe better or worse than your readings show. That indicator has 10% lag built into it! But is usable if you start you readings at the low point, and constantly gain in the reading. If the indicator starts in one place and goes plus, and then minus; the error comes to play. Try (borrow one) a wand type indicator to do a compairison check. Who knows you might be better than you thought! I often recommend to folks that they seek out a B&S Best Test or better yet an Interrapid with .0005" readings. These are zero lag indicators that will give you a much more accurate reading. One last thing to check is to see exactly what reading you are showing just ahead of the base of the case. If you are showing error, I suggest you mark the high spot and rotate the case 180 degrees. If the error stays put in the same spot, I'd send the gauge back for replacement (the error should rotate 180 degrees when you move the case 180 degrees). ( some folks as expected will not like reading this) gary [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Weird Issue with Run out
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