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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth with DBM
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<blockquote data-quote="g0rd0" data-source="post: 1145159" data-attributes="member: 44168"><p>put on your sunglasses, you have reached cooldom.</p><p>what I do is size 1 brass, lube the inside of the neck and sat a bullet in this dummy just enough to hold it in place then chamber it. When the ojive of the bullet contacts the rifling the rifling will be a seat die, after your bolt closes withdraw this and measure, subtract 30 thou and that is where I start </p><p>lets say that the dummy is oal 4.150" adjust your seat die to reseat this dummy to 4.120. Find your sweet spot with your powder charge </p><p>so now you are at 4.120" cci mag primer and 66.5 grn of XXX and you have .75" groups at 100 yards I will now try increasing the oal 5 thou and see if there is any change with the group then I will subtract 5 thou check group,ect till I see positive or negitive results</p><p></p><p>My favorite rifle likes 150grn ETIPS at 10 thou from the lands, 175 grn speer sp 30 thou 150 grn sp 30 thou and 139 grn hornady sp 35 thou. Dont ask me why the ETIPS like 10 thou I cannot hope to answer that, it is what it is</p></blockquote><p></p>
[QUOTE="g0rd0, post: 1145159, member: 44168"] put on your sunglasses, you have reached cooldom. what I do is size 1 brass, lube the inside of the neck and sat a bullet in this dummy just enough to hold it in place then chamber it. When the ojive of the bullet contacts the rifling the rifling will be a seat die, after your bolt closes withdraw this and measure, subtract 30 thou and that is where I start lets say that the dummy is oal 4.150" adjust your seat die to reseat this dummy to 4.120. Find your sweet spot with your powder charge so now you are at 4.120" cci mag primer and 66.5 grn of XXX and you have .75" groups at 100 yards I will now try increasing the oal 5 thou and see if there is any change with the group then I will subtract 5 thou check group,ect till I see positive or negitive results My favorite rifle likes 150grn ETIPS at 10 thou from the lands, 175 grn speer sp 30 thou 150 grn sp 30 thou and 139 grn hornady sp 35 thou. Dont ask me why the ETIPS like 10 thou I cannot hope to answer that, it is what it is [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Seating depth with DBM
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