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Rifles, Reloading, Optics, Equipment
Reloading
Sinclair Expander Mandrel Die Test
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<blockquote data-quote="GLTaylor" data-source="post: 1826208" data-attributes="member: 111593"><p>You are correct. Mandrells make the most difference when someone doesn't neck turn for consistent neck thickness and tension.</p><p>For consistency in seating a bullet, arguably the best method is a Wilson in line seater ( or other) in which the "chamber" of the bullet seating die was cut with the same reamer that your rifle chamber was. This helps perfectly align the case prior to seating the bullet. Absent that, most good/better seaters allow for some movement in Hope's the bullet will center itself in the case neck. In these cases, rotating the cartridge can help to some degree while seating. </p><p>The only drawback (if you consider it one), is you have to use an arbor press to seat your bullets using an in-line seater. I have used in-line seaters for all my rifles for years. It is a carry over from my years shooting benchrest. Runout in all my cartridges runs .0005 to .001</p><p>Guess it depends on how important concentricity is to you?<img class="smilie smilie--emoji" loading="lazy" alt="🤔" title="Thinking face :thinking:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f914.png" data-shortname=":thinking:" /></p></blockquote><p></p>
[QUOTE="GLTaylor, post: 1826208, member: 111593"] You are correct. Mandrells make the most difference when someone doesn't neck turn for consistent neck thickness and tension. For consistency in seating a bullet, arguably the best method is a Wilson in line seater ( or other) in which the "chamber" of the bullet seating die was cut with the same reamer that your rifle chamber was. This helps perfectly align the case prior to seating the bullet. Absent that, most good/better seaters allow for some movement in Hope's the bullet will center itself in the case neck. In these cases, rotating the cartridge can help to some degree while seating. The only drawback (if you consider it one), is you have to use an arbor press to seat your bullets using an in-line seater. I have used in-line seaters for all my rifles for years. It is a carry over from my years shooting benchrest. Runout in all my cartridges runs .0005 to .001 Guess it depends on how important concentricity is to you?🤔 [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Sinclair Expander Mandrel Die Test
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