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284 Jazz
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<blockquote data-quote="Autorotate" data-source="post: 375210" data-attributes="member: 8073"><p>There is a valid debate on the value of weight sorting, as what we care about as precision shooters in the consistency of the volume of the brass.......</p><p></p><p></p><p>But here's the results I saw with 50 randon pieces of brass from lots of 100 from 3 different calibers/mfgs of brass. Yes, I weighed 150 pieces of brass<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p></p><p>338 Norma</p><p>Avg case weight=313.6 grains</p><p>Case weight SD=.2 grains</p><p>Case weight ES=.4 grains</p><p></p><p>338 Lapua</p><p>Avg case weight=326.9</p><p>Case weight SD=.6 grains</p><p>Case weight ES=.7 grains</p><p></p><p>338-378 Wby</p><p>Avg case weight=321.6 grains</p><p>Case weight SD=1.3 grains</p><p>Case weight ES=3.2 grains</p><p></p><p>What does it mean? It wasn't a lab grade scale, so the scale could have drifted some during the "test", but it indicated to me the 338 Norma brass might be consistent<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Autorotate, post: 375210, member: 8073"] There is a valid debate on the value of weight sorting, as what we care about as precision shooters in the consistency of the volume of the brass....... But here's the results I saw with 50 randon pieces of brass from lots of 100 from 3 different calibers/mfgs of brass. Yes, I weighed 150 pieces of brass:( 338 Norma Avg case weight=313.6 grains Case weight SD=.2 grains Case weight ES=.4 grains 338 Lapua Avg case weight=326.9 Case weight SD=.6 grains Case weight ES=.7 grains 338-378 Wby Avg case weight=321.6 grains Case weight SD=1.3 grains Case weight ES=3.2 grains What does it mean? It wasn't a lab grade scale, so the scale could have drifted some during the "test", but it indicated to me the 338 Norma brass might be consistent:) [/QUOTE]
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