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Rifles, Reloading, Optics, Equipment
Reloading
Decreasing bullet runout during bullet seating
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<blockquote data-quote="wallypedal" data-source="post: 919259" data-attributes="member: 7107"><p>I only load for a few different case sizes. Got interested in concentricity, searched the forums and looked at the various devices. I made my own from hardwood. I routed three different depth v- grooves to accommodate different diameter cases, from .223 up to the WSM's. One of the things I think I saw on the Sinclair was the distance between the contact bearings was constant, and so there is a difference in where on the circumference of the case those bearings touch. Somebody who owns one can tell me! </p><p>If that is true, then a very large case is supported more on the bottom, a smaller farther up the sides - I sized the grooves to allow me to support any case where I want to. Made an adjustable stop system to regulate where in the groove the case base stops. </p><p>The dial indicator holder allows for moving the quill laterally anywhere from case base to bullet tip. It has been an education, and pretty enjoyable.</p><p>The terms runout and concentricity are sometimes used interchangeably, but maybe shouldn't be. I think there are 'banana' cases that are that way due to inconsistent wall thicknesses, and it doesn't matter whose sizing die you use, they will want to be bananas again, and we shouldn't blame the die.</p><p>I worked at consistent loading, did some neck turning, and pitched cases that just would not give less than .005 bullet runout. Like the thread title suggests, it was like the runout was being introduced somehow during the seating process. I pitched not many, but a few. I found like others, that cases which had been checked after firing and resizing and had little runout would still show .004" or .005" bullet runout. Perplexing, so I just blamed it on the banana phenomenon, and used them for foulers.</p><p>I learned a lot, became a better tool user and assembler, and don't check concentricity/runout anymore<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />. I'm satisfied my loads are good enough for my needs, for sure the standard we work towards, and understandably different for each of us.</p></blockquote><p></p>
[QUOTE="wallypedal, post: 919259, member: 7107"] I only load for a few different case sizes. Got interested in concentricity, searched the forums and looked at the various devices. I made my own from hardwood. I routed three different depth v- grooves to accommodate different diameter cases, from .223 up to the WSM's. One of the things I think I saw on the Sinclair was the distance between the contact bearings was constant, and so there is a difference in where on the circumference of the case those bearings touch. Somebody who owns one can tell me! If that is true, then a very large case is supported more on the bottom, a smaller farther up the sides - I sized the grooves to allow me to support any case where I want to. Made an adjustable stop system to regulate where in the groove the case base stops. The dial indicator holder allows for moving the quill laterally anywhere from case base to bullet tip. It has been an education, and pretty enjoyable. The terms runout and concentricity are sometimes used interchangeably, but maybe shouldn't be. I think there are 'banana' cases that are that way due to inconsistent wall thicknesses, and it doesn't matter whose sizing die you use, they will want to be bananas again, and we shouldn't blame the die. I worked at consistent loading, did some neck turning, and pitched cases that just would not give less than .005 bullet runout. Like the thread title suggests, it was like the runout was being introduced somehow during the seating process. I pitched not many, but a few. I found like others, that cases which had been checked after firing and resizing and had little runout would still show .004" or .005" bullet runout. Perplexing, so I just blamed it on the banana phenomenon, and used them for foulers. I learned a lot, became a better tool user and assembler, and don't check concentricity/runout anymore:). I'm satisfied my loads are good enough for my needs, for sure the standard we work towards, and understandably different for each of us. [/QUOTE]
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Decreasing bullet runout during bullet seating
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