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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Having problems with getting consistant velocity
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<blockquote data-quote="steve smith" data-source="post: 21442" data-attributes="member: 110"><p>I just went through and found a couple of pieces that weighed 269.2 and 270.4. Both were unfired. Filled with water and an inverted primer(each weighed 5.0gr) inserted they weighed 386.7 and 387.6.</p><p></p><p>(386.7 - 5.0 - 269.2)= 112.5 gr H2O</p><p>(387.6 - 5.0 - 270.4)= 112.2 gr H2O</p><p></p><p>.9 gr difference in brass only equated to .3gr water difference.</p><p> I repeated this 3x only once did the numbers differ by more than .1gr or so. The first try I failed to get an air bubble out of one case. Problem was found and corrected.</p><p></p><p>Moving it up 2gr moved it from 3611 to 3615. Going from 3611 to 3727 took 4 additional gr of powder. I just can't see how such little variation could effect speed so much when it took 4gr more powder to increase 116fps.</p><p></p><p>[ 12-21-2001: Message edited by: txhunter ]</p></blockquote><p></p>
[QUOTE="steve smith, post: 21442, member: 110"] I just went through and found a couple of pieces that weighed 269.2 and 270.4. Both were unfired. Filled with water and an inverted primer(each weighed 5.0gr) inserted they weighed 386.7 and 387.6. (386.7 - 5.0 - 269.2)= 112.5 gr H2O (387.6 - 5.0 - 270.4)= 112.2 gr H2O .9 gr difference in brass only equated to .3gr water difference. I repeated this 3x only once did the numbers differ by more than .1gr or so. The first try I failed to get an air bubble out of one case. Problem was found and corrected. Moving it up 2gr moved it from 3611 to 3615. Going from 3611 to 3727 took 4 additional gr of powder. I just can't see how such little variation could effect speed so much when it took 4gr more powder to increase 116fps. [ 12-21-2001: Message edited by: txhunter ] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Having problems with getting consistant velocity
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