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Rifles, Reloading, Optics, Equipment
Reloading
Does new brass shoot differently than fire-formed brass?
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<blockquote data-quote="lancetkenyon" data-source="post: 2074077" data-attributes="member: 68875"><p>What I would try: load 10 your virgin brass with .1gr and 10 with .2gr more powder than your fired brass load, and go test. </p><p>I have found this should put you right about the same velocity, which should be good to go. I have done this with about 20 different 7RM and .300WMs. Worked every time. I don't think that is just coincidence. </p><p></p><p>Usually, 7RM and .300WM virgin brass is between .014-.021" short on headspace. So they need to form in your chamber like a balloon. Which takes up some pressure to do so. That extra .1-.2gr makes up that lost pressure.</p></blockquote><p></p>
[QUOTE="lancetkenyon, post: 2074077, member: 68875"] What I would try: load 10 your virgin brass with .1gr and 10 with .2gr more powder than your fired brass load, and go test. I have found this should put you right about the same velocity, which should be good to go. I have done this with about 20 different 7RM and .300WMs. Worked every time. I don't think that is just coincidence. Usually, 7RM and .300WM virgin brass is between .014-.021" short on headspace. So they need to form in your chamber like a balloon. Which takes up some pressure to do so. That extra .1-.2gr makes up that lost pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Does new brass shoot differently than fire-formed brass?
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