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Rifles, Reloading, Optics, Equipment
Reloading
Help understanding neck thickness and bushing dies
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<blockquote data-quote="barefooter56" data-source="post: 1065949" data-attributes="member: 85389"><p>screamrider,</p><p>+1 on what AZShooter said. But let me add a couple things. Use the die with the expander ball installed on new brass to remove dents, and expand the case neck up so it will contact the bushing. You can upgrade to a carbide expander ball if you wish. The TYPE-S dies use the same carbide ball kits as the STANDARD Redding dies. DO NOT GET THE CARBIDE BALL KIT FOR THE COMPETITION DIES. Redding bushings can have a .001-.0015 variance in inside diameter either way so watch for this if the bullet seems to seat with little or no effort ( bushing size err to large ID) OR with more effort that seems normal ( bushing size err to small). These can also be a function of neck wall thickness variations between manufacturers or lots of brass. You may also want to do a test to check if you want to leave the expander ball installed in the die. Take 2 fired cases and a concentricity gauge. Check case concentricity on the neck about in the middle of the case neck of first case and note. Run the case through the die with the expander ball installed. Ckeck concentricity the same way again and note. Then repeat with the expander ball removed on the second case. See which way gives you the best result and leave the die set up for fired brass in that configuration. If you want you can also use L.E.Wilson bushings in Redding TYPE-S and Competition dies. You will have to use a different formula to figure bushing size . For .002 neck tension get a bushing .003 under the measurement across the neck of a loaded round. For .003 neck tension .004 under and so on. Reason is that Wilson bushing IDs are truer to the marked size and to account for spring back of the case neck. The Wilson bushings are also a "funnel" type bushing where as the Reddings are a tubular style. The funnel part of the Wilson bushing is their to help with guiding the case neck and to leave the last 1/3 or so of the neck unsized to help center the case in the chamber. One last thing. Install the Redding bushings in the die with the numbers facing DOWN TWORD THE CARTRIDGE CASE. There may be a raised edge where the bushing size has been stamped that can cock the busing in the die as it contacts the stop and effect concentricity.</p></blockquote><p></p>
[QUOTE="barefooter56, post: 1065949, member: 85389"] screamrider, +1 on what AZShooter said. But let me add a couple things. Use the die with the expander ball installed on new brass to remove dents, and expand the case neck up so it will contact the bushing. You can upgrade to a carbide expander ball if you wish. The TYPE-S dies use the same carbide ball kits as the STANDARD Redding dies. DO NOT GET THE CARBIDE BALL KIT FOR THE COMPETITION DIES. Redding bushings can have a .001-.0015 variance in inside diameter either way so watch for this if the bullet seems to seat with little or no effort ( bushing size err to large ID) OR with more effort that seems normal ( bushing size err to small). These can also be a function of neck wall thickness variations between manufacturers or lots of brass. You may also want to do a test to check if you want to leave the expander ball installed in the die. Take 2 fired cases and a concentricity gauge. Check case concentricity on the neck about in the middle of the case neck of first case and note. Run the case through the die with the expander ball installed. Ckeck concentricity the same way again and note. Then repeat with the expander ball removed on the second case. See which way gives you the best result and leave the die set up for fired brass in that configuration. If you want you can also use L.E.Wilson bushings in Redding TYPE-S and Competition dies. You will have to use a different formula to figure bushing size . For .002 neck tension get a bushing .003 under the measurement across the neck of a loaded round. For .003 neck tension .004 under and so on. Reason is that Wilson bushing IDs are truer to the marked size and to account for spring back of the case neck. The Wilson bushings are also a "funnel" type bushing where as the Reddings are a tubular style. The funnel part of the Wilson bushing is their to help with guiding the case neck and to leave the last 1/3 or so of the neck unsized to help center the case in the chamber. One last thing. Install the Redding bushings in the die with the numbers facing DOWN TWORD THE CARTRIDGE CASE. There may be a raised edge where the bushing size has been stamped that can cock the busing in the die as it contacts the stop and effect concentricity. [/QUOTE]
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Help understanding neck thickness and bushing dies
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