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Rifles, Reloading, Optics, Equipment
Reloading
280 AI primer ?: Magnum or not???
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<blockquote data-quote="J E Custom" data-source="post: 155196" data-attributes="member: 2736"><p>Bill</p><p></p><p>I would recomend letting the load determine which primer</p><p>is best.</p><p></p><p>The only time I have needed the magnum primer was when</p><p>using 90 plus grains of very slow powder(50BMG,H870,ETC)</p><p></p><p>I always start with standard primers and work up(the cups</p><p>are thiner and pressure is easy to read)</p><p></p><p>If you reach max pressure with low standard deviation you</p><p>have enough primer.</p><p></p><p>If the standard deviation is poor (20 fps Plus)then a </p><p>magnum primer may be nessary. but load down if you switch</p><p>from stanard to magnum primer.</p><p></p><p>Magnum primers will increase velocity but may lead to poor</p><p>standard deviation,s and this could be a problem at long</p><p>range.</p><p></p><p>On long range rifle,s I try to keep a standard deviation</p><p>of less than 10fps.</p><p></p><p>I would think the 280AI should not need a mag primer but</p><p>recomend you chronograph each load to make sure.</p><p></p><p>Just an opinion /ubbthreads/images/graemlins/smile.gif</p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 155196, member: 2736"] Bill I would recomend letting the load determine which primer is best. The only time I have needed the magnum primer was when using 90 plus grains of very slow powder(50BMG,H870,ETC) I always start with standard primers and work up(the cups are thiner and pressure is easy to read) If you reach max pressure with low standard deviation you have enough primer. If the standard deviation is poor (20 fps Plus)then a magnum primer may be nessary. but load down if you switch from stanard to magnum primer. Magnum primers will increase velocity but may lead to poor standard deviation,s and this could be a problem at long range. On long range rifle,s I try to keep a standard deviation of less than 10fps. I would think the 280AI should not need a mag primer but recomend you chronograph each load to make sure. Just an opinion [img]/ubbthreads/images/graemlins/smile.gif[/img] J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
280 AI primer ?: Magnum or not???
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