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The Basics, Starting Out
.008 shoulder Bump?
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<blockquote data-quote="ajkellerusmc" data-source="post: 2159306" data-attributes="member: 108702"><p>So Here I am resizing 2x fired Lapua .308 brass and to get the bolt to close without any resistance I have to get to where my #20 sinclair comparator tells me that I have bumped the shoulder a whole .008". I am confused as this has not happened to me before with this rifle and a few others. I have always bumped .002 and had the bolt easy to close on a resized piece of brass. If I screw the die all the way down over center and do a full resize I get .012" bump. When I acheive a .004 reading on the comparator I can see that the neck is only about 80% of the way resized, to me meaning the shoulder has not even contacted the die yet.</p><p></p><p>Pictures show what seems to be happening. The .008 and .012 cases chamber easily.</p><p></p><p>Particulars:</p><p></p><p>Brass Lapua 2x fired, deprimed cleaned and annealed, imperial resizing wax.</p><p></p><p>Redding premium resizing die with decapper and expander removed in a Harrells press.</p><p></p><p>Rifle is a Ruger american predator 18" (stock)</p><p></p><p>I am confused</p></blockquote><p></p>
[QUOTE="ajkellerusmc, post: 2159306, member: 108702"] So Here I am resizing 2x fired Lapua .308 brass and to get the bolt to close without any resistance I have to get to where my #20 sinclair comparator tells me that I have bumped the shoulder a whole .008". I am confused as this has not happened to me before with this rifle and a few others. I have always bumped .002 and had the bolt easy to close on a resized piece of brass. If I screw the die all the way down over center and do a full resize I get .012" bump. When I acheive a .004 reading on the comparator I can see that the neck is only about 80% of the way resized, to me meaning the shoulder has not even contacted the die yet. Pictures show what seems to be happening. The .008 and .012 cases chamber easily. Particulars: Brass Lapua 2x fired, deprimed cleaned and annealed, imperial resizing wax. Redding premium resizing die with decapper and expander removed in a Harrells press. Rifle is a Ruger american predator 18" (stock) I am confused [/QUOTE]
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The Basics, Starting Out
.008 shoulder Bump?
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