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Rifles, Reloading, Optics, Equipment
Reloading
measuring water capacity
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<blockquote data-quote="Stammster" data-source="post: 2141560" data-attributes="member: 114381"><p>Fired case capacity gives you the internal volume of that brass fired in your chamber.</p><p></p><p>Case capacity after resizing gives you internal volume of that brass for your die.</p><p></p><p>Depending on the size of your rifle chamber and dies, the volume after FL resizing could change (reduced) by as much at 0.5-1.5 gr H20, assuming you only bump the shoulder back a few 1000s. Neck sizing is a lot closer, but there is still a slight difference.</p><p>(Note: I measure case capacity in grains H20 using my scale. Note case trim length also, as that also effects capacity.</p><p></p><p>The question is, what are you going to use that H20 capacity number for? If using it for QL, I would use fired/not resized. However, as long as you are consistent and measure your velocities - either method will work. You will just have a slightly different Ba for your lot of powder depending on method, in order to get a match of MV vs powder charge weight.</p></blockquote><p></p>
[QUOTE="Stammster, post: 2141560, member: 114381"] Fired case capacity gives you the internal volume of that brass fired in your chamber. Case capacity after resizing gives you internal volume of that brass for your die. Depending on the size of your rifle chamber and dies, the volume after FL resizing could change (reduced) by as much at 0.5-1.5 gr H20, assuming you only bump the shoulder back a few 1000s. Neck sizing is a lot closer, but there is still a slight difference. (Note: I measure case capacity in grains H20 using my scale. Note case trim length also, as that also effects capacity. The question is, what are you going to use that H20 capacity number for? If using it for QL, I would use fired/not resized. However, as long as you are consistent and measure your velocities - either method will work. You will just have a slightly different Ba for your lot of powder depending on method, in order to get a match of MV vs powder charge weight. [/QUOTE]
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measuring water capacity
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