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Rifles, Reloading, Optics, Equipment
Reloading
Expanding vs Turning Mandrels
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<blockquote data-quote="QuietTexan" data-source="post: 2426393" data-attributes="member: 116181"><p>Ultimately you have to shoot it and see, but you're on the right path to move forward and try it. -0.004" bushing /-0.002" mandrel is a perfectly good place to start. The next logical step to me after that would be -0.003/-0.001". Same +0.002 mandrel movement, less ending tension.</p><p></p><p>My 6.5mm I'm currently using -0.003/-0.001" after annealing with my AMP. Was using -0.002/-0.0015" for the first two firings on the brass, the shoulders weren't being bumped yet and the mandrel was barely doing anything to the necks because they were popping back open pretty well (I moved up the half-thou because the -.001 wasn't even touching seemed like) but the bullets sat fine. Annealed at 3F when the shoulder started bumping, definitely felt the mandrel moving the necks at that point.</p><p></p><p>I've done -0.002/-0.000" after annealing in my .338 cal single shot action because bullet set back isn't a worry there, and it has more surface area to grip. So everything here is somewhat relative.</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2426393, member: 116181"] Ultimately you have to shoot it and see, but you're on the right path to move forward and try it. -0.004" bushing /-0.002" mandrel is a perfectly good place to start. The next logical step to me after that would be -0.003/-0.001". Same +0.002 mandrel movement, less ending tension. My 6.5mm I'm currently using -0.003/-0.001" after annealing with my AMP. Was using -0.002/-0.0015" for the first two firings on the brass, the shoulders weren't being bumped yet and the mandrel was barely doing anything to the necks because they were popping back open pretty well (I moved up the half-thou because the -.001 wasn't even touching seemed like) but the bullets sat fine. Annealed at 3F when the shoulder started bumping, definitely felt the mandrel moving the necks at that point. I've done -0.002/-0.000" after annealing in my .338 cal single shot action because bullet set back isn't a worry there, and it has more surface area to grip. So everything here is somewhat relative. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Expanding vs Turning Mandrels
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