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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass vs. fire formed
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<blockquote data-quote="J E Custom" data-source="post: 317092" data-attributes="member: 2736"><p>I understand all of the ways of measuring the head space and don't disagree with any of that</p><p>Just the amount of head space that you are willing to except !!!</p><p></p><p>I have never claimed to be all knowing But those tolerances are just not acceptable to me.</p><p></p><p>The chamber reamers that I use are SAAMI spec. and on a belted case the distance between </p><p>the front of the belt to the datum point are set by the reamer manufacture and cannot be </p><p>altered unless you specify something different.</p><p></p><p>Also brass is a material that can be altered but a chamber can't once it is finished . But why on</p><p>earth would you want the reamer made to fit the brass which by your own admission varies</p><p>a great deal.</p><p></p><p>Belted cases were introduced for a reason .They were designed to chamber under all conditions</p><p>because when hunting dangerous game one cannot afford to have a miss feed .so the concept was to have excess space in the chamber with out excess head space that would allow the</p><p>round to move forward enough to miss fire (Just as bad as not feeding) . And brass life is not</p><p>even a consideration under those conditions.</p><p></p><p>Most people that use belted cases re size only enough to chamber unless it is going to be used</p><p>for dangerous game and then full length size or even use what I call a small base die (Smaller</p><p>than SAAMI spec) to make sure it will feed and function. but the head space is still measured from the Bolt face to the back of the go head space gauge and if the bolt will close on a NO GO</p><p>gauge then It has excessive head space.</p><p></p><p>And you are right about the brass manufactures needing to make there brass to SAAMI but it is</p><p>not all ways perfect so that's the reason for fire forming and then sizing only enough to chamber</p><p>the round and extend brass life.</p><p></p><p>Maybe my standards are to high but I don't and won't own any firearm with more that .003 head</p><p>space period.</p><p></p><p>So It is just the way I see it and that's what makes the world go round.</p><p></p><p>It has still been a good debate. </p><p></p><p>Thanks</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 317092, member: 2736"] I understand all of the ways of measuring the head space and don't disagree with any of that Just the amount of head space that you are willing to except !!! I have never claimed to be all knowing But those tolerances are just not acceptable to me. The chamber reamers that I use are SAAMI spec. and on a belted case the distance between the front of the belt to the datum point are set by the reamer manufacture and cannot be altered unless you specify something different. Also brass is a material that can be altered but a chamber can't once it is finished . But why on earth would you want the reamer made to fit the brass which by your own admission varies a great deal. Belted cases were introduced for a reason .They were designed to chamber under all conditions because when hunting dangerous game one cannot afford to have a miss feed .so the concept was to have excess space in the chamber with out excess head space that would allow the round to move forward enough to miss fire (Just as bad as not feeding) . And brass life is not even a consideration under those conditions. Most people that use belted cases re size only enough to chamber unless it is going to be used for dangerous game and then full length size or even use what I call a small base die (Smaller than SAAMI spec) to make sure it will feed and function. but the head space is still measured from the Bolt face to the back of the go head space gauge and if the bolt will close on a NO GO gauge then It has excessive head space. And you are right about the brass manufactures needing to make there brass to SAAMI but it is not all ways perfect so that's the reason for fire forming and then sizing only enough to chamber the round and extend brass life. Maybe my standards are to high but I don't and won't own any firearm with more that .003 head space period. So It is just the way I see it and that's what makes the world go round. It has still been a good debate. Thanks J E CUSTOM [/QUOTE]
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Reloading
Virgin brass vs. fire formed
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