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The Basics, Starting Out
.008 shoulder Bump?
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<blockquote data-quote="Dean2" data-source="post: 2167258" data-attributes="member: 26077"><p>I have a Hornady comparator. I never use it unless I run into some kind of a problem. Shoulder bump is measured by how far the shoulder neck junction and/or the shoulder itseld are pushed back. It is the point farthest from the rim that the case will headspace on for cartridges you have sized to space on the shoulder. You need to measure both dimensions if you are actually trying to figure things out correctly. You can push the shoulder back a long ways too far if you are leaving the neck shoulder junction interfering in the seating depth.</p><p></p><p> I often set my belted mags and Rimmed cartridges to space off the shoulder so I don't over size them. Works as long as there is a reasonable shoulder. Even the ones that I leave so they headspace off the belt or rim I size as little as possible. Once the cartridge fits in the chamber easily, and yours do after firing. bumping anything amounts to over sizing the case.</p></blockquote><p></p>
[QUOTE="Dean2, post: 2167258, member: 26077"] I have a Hornady comparator. I never use it unless I run into some kind of a problem. Shoulder bump is measured by how far the shoulder neck junction and/or the shoulder itseld are pushed back. It is the point farthest from the rim that the case will headspace on for cartridges you have sized to space on the shoulder. You need to measure both dimensions if you are actually trying to figure things out correctly. You can push the shoulder back a long ways too far if you are leaving the neck shoulder junction interfering in the seating depth. I often set my belted mags and Rimmed cartridges to space off the shoulder so I don't over size them. Works as long as there is a reasonable shoulder. Even the ones that I leave so they headspace off the belt or rim I size as little as possible. Once the cartridge fits in the chamber easily, and yours do after firing. bumping anything amounts to over sizing the case. [/QUOTE]
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.008 shoulder Bump?
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