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Rifles, Reloading, Optics, Equipment
Reloading
Bump guage reality
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<blockquote data-quote="243winxb" data-source="post: 2007189" data-attributes="member: 97793"><p>Its good to use a bump gauge,, but fired brass doesn't always expand fully to a chamber. False measurement.</p><p></p><p>Bump gage/comparator is to compare fired & sized brass.Tolerances, see <a href="https://saami.org/" target="_blank">https://saami.org/</a></p><p></p><p>These measure chambers.</p><p><strong>Go Gauge:</strong> Go Gauges match the minimum chamber dimensions allowable under SAAMI specifications. In order to accept SAAMI maximum ammunition, the rifle must be able to chamber the correct go gauge.</p><p></p><p></p><p></p><p><strong>No-Go Gauge:</strong> No-Go Gauges are sized to the maximum recommended headspace dimensions. If a rifle will chamber the no-go gauge, it may still be within specifications, or this could indicate excessive headspace. To determine if the rifle is safe to shoot, the chamber must be checked with the field gauge.</p><p></p><p></p><p></p><p><strong>Field Gauge:</strong> Field Gauges correspond to the maximum safe headspace dimension. If a rifle will chamber a field gauge, it should be inspected and repaired by a competent gunsmith prior to use.</p><p>[ATTACH]221432[/ATTACH]</p><p></p><p>Head clearance runs from .000" to .015" (Tolerances)</p></blockquote><p></p>
[QUOTE="243winxb, post: 2007189, member: 97793"] Its good to use a bump gauge,, but fired brass doesn't always expand fully to a chamber. False measurement. Bump gage/comparator is to compare fired & sized brass.Tolerances, see [URL]https://saami.org/[/URL] These measure chambers. [B]Go Gauge:[/B] Go Gauges match the minimum chamber dimensions allowable under SAAMI specifications. In order to accept SAAMI maximum ammunition, the rifle must be able to chamber the correct go gauge. [B]No-Go Gauge:[/B] No-Go Gauges are sized to the maximum recommended headspace dimensions. If a rifle will chamber the no-go gauge, it may still be within specifications, or this could indicate excessive headspace. To determine if the rifle is safe to shoot, the chamber must be checked with the field gauge. [B]Field Gauge:[/B] Field Gauges correspond to the maximum safe headspace dimension. If a rifle will chamber a field gauge, it should be inspected and repaired by a competent gunsmith prior to use. [ATTACH alt="Screenshot_20201025-161633_Chrome.jpg"]221432[/ATTACH] Head clearance runs from .000" to .015" (Tolerances) [/QUOTE]
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Bump guage reality
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