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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why not use expander balls?
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<blockquote data-quote="Mikecr" data-source="post: 896914" data-attributes="member: 1521"><p>For one thing, use of bushings or not is irrelevant to this.</p><p>You can pre-expand necks prior to bullet seating so that you're not sizing necks with bullets, so that continuing springback will increase tension over time, and to drive thickness variance outward(for straighter seating).</p><p>You could choose a die/bushing to provide proper interference without expansion, but seating may not be as straight, and continuing springback will reduce tension over time. To counter this, many have embraced constant annealing.</p><p></p><p>I choose to expand and measure expansion forces while doing so, but I don't use a ball in the die.</p><p>I use a Sinclair mandrel, and for depriming I use a hand tool.</p><p><a href="http://www.sinclairintl.com/reloading-equipment/case-preparation/neck-turning/turning-expander-mandrels/sinclair-generation-ii-expander-dies-prod38807.aspx" target="_blank">SINCLAIR GENERATION II EXPANDER DIES | Sinclair Intl</a></p><p><a href="http://www.sinclairintl.com/reloading-equipment/case-preparation/neck-turning/turning-expander-mandrels/sinclair-expander-mandrel-oversized-prod33134.aspx" target="_blank">SINCLAIR EXPANDER MANDREL - OVERSIZED | Sinclair Intl</a></p><p><a href="http://www.neiljones.com/html/decapping_tool.html" target="_blank">DECAPPING TOOL</a></p></blockquote><p></p>
[QUOTE="Mikecr, post: 896914, member: 1521"] For one thing, use of bushings or not is irrelevant to this. You can pre-expand necks prior to bullet seating so that you're not sizing necks with bullets, so that continuing springback will increase tension over time, and to drive thickness variance outward(for straighter seating). You could choose a die/bushing to provide proper interference without expansion, but seating may not be as straight, and continuing springback will reduce tension over time. To counter this, many have embraced constant annealing. I choose to expand and measure expansion forces while doing so, but I don't use a ball in the die. I use a Sinclair mandrel, and for depriming I use a hand tool. [url=http://www.sinclairintl.com/reloading-equipment/case-preparation/neck-turning/turning-expander-mandrels/sinclair-generation-ii-expander-dies-prod38807.aspx]SINCLAIR GENERATION II EXPANDER DIES | Sinclair Intl[/url] [url=http://www.sinclairintl.com/reloading-equipment/case-preparation/neck-turning/turning-expander-mandrels/sinclair-expander-mandrel-oversized-prod33134.aspx]SINCLAIR EXPANDER MANDREL - OVERSIZED | Sinclair Intl[/url] [url=http://www.neiljones.com/html/decapping_tool.html]DECAPPING TOOL[/url] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Why not use expander balls?
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