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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass vs. fire formed
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<blockquote data-quote="Frogman77" data-source="post: 317093" data-attributes="member: 15339"><p>In my post about my .30-06 I wasn't saying that I have .020" of head space. I was reffering to the original post about fireforming new brass. </p><p> </p><p>When I use new winchester .30-06 brass it measures 1.934" to the shoulder using a sinclair bump guage. After firing once, the new measurement is 1.953-1.954". This once fired brass chambers with a crush fit and requires a little effort to close the bolt.</p><p> </p><p>Now according to my reloading manuals, miniumum cartridge length to the shoulder is 1.948"</p><p> </p><p>So from this information I would say that I have .005-.006" of headspace from saami specs. Maybe a little less since the once fired brass already has a crush fit to it?</p><p> </p><p>Using the new winchester brass, the case was stretching too much (about .020") and I found a degradation of accuracy and also a few cases with flattening primers that with once fired brass using the same recipe had no pressure signs at all.</p><p> </p><p>Sorry for the confusion. regarding the headspace issue.</p></blockquote><p></p>
[QUOTE="Frogman77, post: 317093, member: 15339"] In my post about my .30-06 I wasn't saying that I have .020" of head space. I was reffering to the original post about fireforming new brass. When I use new winchester .30-06 brass it measures 1.934" to the shoulder using a sinclair bump guage. After firing once, the new measurement is 1.953-1.954". This once fired brass chambers with a crush fit and requires a little effort to close the bolt. Now according to my reloading manuals, miniumum cartridge length to the shoulder is 1.948" So from this information I would say that I have .005-.006" of headspace from saami specs. Maybe a little less since the once fired brass already has a crush fit to it? Using the new winchester brass, the case was stretching too much (about .020") and I found a degradation of accuracy and also a few cases with flattening primers that with once fired brass using the same recipe had no pressure signs at all. Sorry for the confusion. regarding the headspace issue. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Virgin brass vs. fire formed
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