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Rifles, Reloading, Optics, Equipment
Reloading
Starting with new brass
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<blockquote data-quote="cdherman" data-source="post: 1426501" data-attributes="member: 12282"><p>When working with quality brass (lapua, norma, RWS) the flash holes will be fine without reaming or chamfering. I would never FL resize new brass with a standard FL die. Those dies push the whole body down, as well as the neck and then pull the expander back through the neck. You are working the brass -- resulting in hardening. More hardening equals variation in neckg tension, which results in inaccuracy. Nevermind split necks eventually.</p><p></p><p>For virgin brass, my choice after a lot of reading and use, is the Sinclair expander mandrel. With quality brass, new stuff, I expand to using graphite (no need to clean afterwards), then champfer. That cleans out the dented necks and uniforms the inside neck dimensions so that bullet tension is uniform.</p><p></p><p>Later, annealing is needed. Different thread....</p><p></p><p>Standard FL dies tend to size the neck way down and then open back up with the expander ball. This is fine for average work, but it works the brass, and early splits will occur, as well as variable neck tension.</p></blockquote><p></p>
[QUOTE="cdherman, post: 1426501, member: 12282"] When working with quality brass (lapua, norma, RWS) the flash holes will be fine without reaming or chamfering. I would never FL resize new brass with a standard FL die. Those dies push the whole body down, as well as the neck and then pull the expander back through the neck. You are working the brass -- resulting in hardening. More hardening equals variation in neckg tension, which results in inaccuracy. Nevermind split necks eventually. For virgin brass, my choice after a lot of reading and use, is the Sinclair expander mandrel. With quality brass, new stuff, I expand to using graphite (no need to clean afterwards), then champfer. That cleans out the dented necks and uniforms the inside neck dimensions so that bullet tension is uniform. Later, annealing is needed. Different thread.... Standard FL dies tend to size the neck way down and then open back up with the expander ball. This is fine for average work, but it works the brass, and early splits will occur, as well as variable neck tension. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Starting with new brass
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