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Rifles, Reloading, Optics, Equipment
Reloading
Getting ES and SD down to single digits
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<blockquote data-quote="MagnumManiac" data-source="post: 2401316" data-attributes="member: 10755"><p>My best ever improvement I made to my ES/SD dropping to single digits was to drop bushing dies.</p><p>I then bought Forster honed neck BR dies with custom expanders and a mandrel set.</p><p>I have also honed the necks on several RCBS dies and modified the expanders or made my own and have .002" movement within the die from sized to expanded.</p><p>I also use mandrels to get my final neck tension.</p><p>Experimentation is key, if you don't try different neck tensions you will never know what works or not.</p><p>My 32" F-class Open barrel in 300WM loves .0015" interference, my 28" barrel in the same cal loves .004".</p><p>My custom 25-06 loves .0025", my Rem Sendero 25-06 loves .001".</p><p>Reducing how much brass movement there is, is the biggest factor for me in reducing ES/SD numbers, BUT the results on target, regardless of what the chrony says rules.</p><p>I have a short course load in 25-06 with a 100g custom target bullet that puts 5 shots in the same hole @ 100……the ES on that load is right on an average of 100fps, go figure.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2401316, member: 10755"] My best ever improvement I made to my ES/SD dropping to single digits was to drop bushing dies. I then bought Forster honed neck BR dies with custom expanders and a mandrel set. I have also honed the necks on several RCBS dies and modified the expanders or made my own and have .002” movement within the die from sized to expanded. I also use mandrels to get my final neck tension. Experimentation is key, if you don’t try different neck tensions you will never know what works or not. My 32” F-class Open barrel in 300WM loves .0015” interference, my 28” barrel in the same cal loves .004”. My custom 25-06 loves .0025”, my Rem Sendero 25-06 loves .001”. Reducing how much brass movement there is, is the biggest factor for me in reducing ES/SD numbers, BUT the results on target, regardless of what the chrony says rules. I have a short course load in 25-06 with a 100g custom target bullet that puts 5 shots in the same hole @ 100……the ES on that load is right on an average of 100fps, go figure. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Getting ES and SD down to single digits
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