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Rifles, Reloading, Optics, Equipment
Reloading
Optimal neck tension for hunting
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<blockquote data-quote="A/C Guy" data-source="post: 284420" data-attributes="member: 13490"><p>The tension will affect the pressure curve and the timing of the bullet leaving the chamber which will have a huge affect on group size.</p><p>The ideal powder charge for a given cartridge with .002 neck tension will be different than the ideal powder charge for the same cartridge with .004 neck tension. That is not to say that the neck tension of .002 or .004 will not work in a given rifle. If it just one more variable that we have to keep constant in order to minimize group sizes. Either tension will work, you just need to not vary the tension. Just as we try not to vary seating depth, we need to have consistent neck tension.</p><p></p><p>Annealing is not just about increasing brass life. Annealing returns the brass to it's original elasticity. THAT affects neck tension as much the diameter. A work hardened case neck loses elasticity and that reduces the grip of the neck on the bullet. When you force the bullet into a neck that is work hardened, the neck opens and grips with less tension than a neck that has been annealed. Annealing will give you more consistent neck grip on the bullet. That is critical.</p></blockquote><p></p>
[QUOTE="A/C Guy, post: 284420, member: 13490"] The tension will affect the pressure curve and the timing of the bullet leaving the chamber which will have a huge affect on group size. The ideal powder charge for a given cartridge with .002 neck tension will be different than the ideal powder charge for the same cartridge with .004 neck tension. That is not to say that the neck tension of .002 or .004 will not work in a given rifle. If it just one more variable that we have to keep constant in order to minimize group sizes. Either tension will work, you just need to not vary the tension. Just as we try not to vary seating depth, we need to have consistent neck tension. Annealing is not just about increasing brass life. Annealing returns the brass to it's original elasticity. THAT affects neck tension as much the diameter. A work hardened case neck loses elasticity and that reduces the grip of the neck on the bullet. When you force the bullet into a neck that is work hardened, the neck opens and grips with less tension than a neck that has been annealed. Annealing will give you more consistent neck grip on the bullet. That is critical. [/QUOTE]
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Optimal neck tension for hunting
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