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Rifles, Reloading, Optics, Equipment
Reloading
High velocity
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<blockquote data-quote="Mikecr" data-source="post: 2314064" data-attributes="member: 1521"><p>Necking down, if he did that, does thicken necks. </p><p>But for necks to thicken to problem with only additional reloading cycles takes extreme FL sizing, leading to a lot of trimming.</p><p>You really have to go out of your way to do that, as you're basically re-forming the cartridge with every cycle.</p><p>I know it works for some, but it just always seemed extreme to me. The brass would never reach a stable point in life.</p><p></p><p>In that situation, pressure won't go up due to lower neck clearance. ANY neck clearance is the same to bullet release, little or a lot.</p><p>But cases hold memory. When they're expanding a lot in a loose chamber, they want to go right where they have been. It takes far less energy for them to go where they've been, and that's less energy being absorbed. So the cases slam chamber walls (practically immovable object) sooner, causing ever higher peak pressures. This, regardless of further excess sizing.</p><p>And keep in mind that every bit of brass trimmed away means that much of the brass character is changing.</p><p>Thick body brass is moving upward, thick toward thin. This contributing further to case bodies slamming harder into chamber, as the bodies are getting thinner, while you're noticing necks getting thicker.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2314064, member: 1521"] Necking down, if he did that, does thicken necks. But for necks to thicken to problem with only additional reloading cycles takes extreme FL sizing, leading to a lot of trimming. You really have to go out of your way to do that, as you're basically re-forming the cartridge with every cycle. I know it works for some, but it just always seemed extreme to me. The brass would never reach a stable point in life. In that situation, pressure won't go up due to lower neck clearance. ANY neck clearance is the same to bullet release, little or a lot. But cases hold memory. When they're expanding a lot in a loose chamber, they want to go right where they have been. It takes far less energy for them to go where they've been, and that's less energy being absorbed. So the cases slam chamber walls (practically immovable object) sooner, causing ever higher peak pressures. This, regardless of further excess sizing. And keep in mind that every bit of brass trimmed away means that much of the brass character is changing. Thick body brass is moving upward, thick toward thin. This contributing further to case bodies slamming harder into chamber, as the bodies are getting thinner, while you're noticing necks getting thicker. [/QUOTE]
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