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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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<blockquote data-quote="lancetkenyon" data-source="post: 2874857" data-attributes="member: 68875"><p>The 40° shoulder is the problem (for necking up or down). Too much pressure on that 40° shoulder and it collapses. </p><p></p><p>I would be necking up in at LEAST 4 steps from .284 to .338. Probably even 5 or 6.</p><p></p><p>When I neck DOWN the 6.5SS brass (comes as slightly bigger than 7mm too) from 7mm to 6.5mm, I do it in 3 steps. With a .305, .297, amd .291 bushing. I lube necks at each stage.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 2874857, member: 68875"] The 40° shoulder is the problem (for necking up or down). Too much pressure on that 40° shoulder and it collapses. I would be necking up in at LEAST 4 steps from .284 to .338. Probably even 5 or 6. When I neck DOWN the 6.5SS brass (comes as slightly bigger than 7mm too) from 7mm to 6.5mm, I do it in 3 steps. With a .305, .297, amd .291 bushing. I lube necks at each stage. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
crushing case necks when using expander mandrel to open case neck on a 338SS
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