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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Head separation on my brass
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<blockquote data-quote="Dean2" data-source="post: 1852096" data-attributes="member: 26077"><p>That is a highly unreliable way to measure head space. There are a raft of accurate and easy to do ways to measure it, primer back out is not one of them. On top of which you are recommending using a resized piece of brass so if the OP is over sizing his brass that will contribute to a false reading too.</p><p></p><p>Go, no-go, and a field field gauge set is the best method. The OP has already posted that the bolt won't close on a no-go gauge so he does not have excess head space. The ring is forming on the first firing of factory Hornady ammo, so clearly the issue is the ammo/brass. In the absence of having the proper gauges, the next closest approximation of head space, it will be out by the brass shrinkage factor post firing, is measuring a factory round from the base to the neck Datum line, before and after firing to see how much the neck has moved forward and OAL has increased.</p><p></p><p>[ATTACH=full]181224[/ATTACH]</p></blockquote><p></p>
[QUOTE="Dean2, post: 1852096, member: 26077"] That is a highly unreliable way to measure head space. There are a raft of accurate and easy to do ways to measure it, primer back out is not one of them. On top of which you are recommending using a resized piece of brass so if the OP is over sizing his brass that will contribute to a false reading too. Go, no-go, and a field field gauge set is the best method. The OP has already posted that the bolt won't close on a no-go gauge so he does not have excess head space. The ring is forming on the first firing of factory Hornady ammo, so clearly the issue is the ammo/brass. In the absence of having the proper gauges, the next closest approximation of head space, it will be out by the brass shrinkage factor post firing, is measuring a factory round from the base to the neck Datum line, before and after firing to see how much the neck has moved forward and OAL has increased. [ATTACH type="full" alt="1584037488241.png"]181224[/ATTACH] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Head separation on my brass
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