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Rifles, Reloading, Optics, Equipment
Gunsmithing
Headspace Explained
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<blockquote data-quote="J E Custom" data-source="post: 1836225" data-attributes="member: 2736"><p>Go gauges are the Minimum that SAMMI recognizes, To be within SAMMI Specification, the bolt has to close on the go gauge, so the go gauge would set the head space as .0000 if it will allow the bolt to close with no clearance between the gauge and the bolt.</p><p></p><p>I like to add shims for the needed head space to the back of the go gauge to set head space exactly what I want it to end up. The type of cartridge has a bearing on the amount also. With the head space set, I can shoot factory ammo or load fire formed cases that have Zero head space if desired with no movement of the case and no compression (bolt in battery has no movement when fired), and shoot them in the same chamber.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1836225, member: 2736"] Go gauges are the Minimum that SAMMI recognizes, To be within SAMMI Specification, the bolt has to close on the go gauge, so the go gauge would set the head space as .0000 if it will allow the bolt to close with no clearance between the gauge and the bolt. I like to add shims for the needed head space to the back of the go gauge to set head space exactly what I want it to end up. The type of cartridge has a bearing on the amount also. With the head space set, I can shoot factory ammo or load fire formed cases that have Zero head space if desired with no movement of the case and no compression (bolt in battery has no movement when fired), and shoot them in the same chamber. J E CUSTOM [/QUOTE]
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Headspace Explained
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