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Long Range Hunting & Shooting
What do you consider good enough?
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<blockquote data-quote="Locknload" data-source="post: 1593663" data-attributes="member: 20333"><p>If you measure and sort by case capacity, not the case weight, you can reduce your groups from .3 to .1 as long as the barrelmis good and the twist is right for the bullet length. The gas pressure is determined by the volume of the cylinder that contains the gas, not the weight of the cylinder itself. Every case has parts with weight that have no bearing what so ever on the pressure. Doubt it, just how much does the rim of the case weigh?</p><p></p><p>If you sort by capacity you will find different weights of brass with the exact same capacity.</p><p></p><p>Mark the capacity sorted base of the brass with a ball end carbide cutter x for match, one line another group, then two parallel lines for another group, etc. A motor tool does fine.</p><p>Ed</p></blockquote><p></p>
[QUOTE="Locknload, post: 1593663, member: 20333"] If you measure and sort by case capacity, not the case weight, you can reduce your groups from .3 to .1 as long as the barrelmis good and the twist is right for the bullet length. The gas pressure is determined by the volume of the cylinder that contains the gas, not the weight of the cylinder itself. Every case has parts with weight that have no bearing what so ever on the pressure. Doubt it, just how much does the rim of the case weigh? If you sort by capacity you will find different weights of brass with the exact same capacity. Mark the capacity sorted base of the brass with a ball end carbide cutter x for match, one line another group, then two parallel lines for another group, etc. A motor tool does fine. Ed [/QUOTE]
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