This guide details a cost-effective DIY method for measuring Cartridge Overall Length (COAL) using common tools like scotch tape and dial calipers, bypassing expensive commercial gauges. It explains COAL's importance for safety and accuracy, referencing SAAMI standards and reloading manuals. The video emphasizes understanding factors limiting COAL, such as magazine capacity and bullet design, and provides a practical, step-by-step process for determining maximum COAL specific to a rifle and bullet combination.
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