This expert guide details a comprehensive 'barrel autopsy' procedure, as demonstrated by the School of the American Rifle. It covers essential checks including thread concentricity, material identification, magnetic properties of the extension, erosion gauging, bore straightness, gas port alignment, and headspace verification using specialized gauges. A critical borescope inspection revealed a manufacturing defect: a smoothbore barrel lacking rifling, highlighting the importance of thorough inspection regardless of brand or price due to potential quality control lapses.
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