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Rifles, Reloading, Optics, Equipment
Gunsmithing
How to measure barrel length?
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<blockquote data-quote="J E Custom" data-source="post: 1972858" data-attributes="member: 2736"><p>There is a legal way to measure barrel length and it is from the bolt face to the muzzle. There is also an effective barrel length measurement that Is from the beginning of the lands to the muzzle. (this measurement is not used because most people cant find that point and because It varies based on the cartridge it's self and is the point that the barrel takes control of the bullet and pressure.</p><p></p><p>It is however a good way to understand the velocity gain in actual barrel length. A good example of the difference in this way of measuring effective barrel length would be the difference in a 7 mm short magnum and a standard 7 mm rem magnum with the same barrel length from the bolt face to the muzzle. The difference is 0.409 in actual effective length. Not much, but a 1/2 inch can increase the velocity with all things being equal. with even shorter cartridges, the effective barrel length can be more The 7 mm BR would be more than 1.500 inches longer than the 7 rem mag in the same length. </p><p></p><p>So the right/universal way to measure the barrel length that best fits all cartridges is the bolt/ breach face to the muzzle. <img class="smilie smilie--emoji" loading="lazy" alt="👍" title="Thumbs up :thumbsup:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f44d.png" data-shortname=":thumbsup:" /> </p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1972858, member: 2736"] There is a legal way to measure barrel length and it is from the bolt face to the muzzle. There is also an effective barrel length measurement that Is from the beginning of the lands to the muzzle. (this measurement is not used because most people cant find that point and because It varies based on the cartridge it's self and is the point that the barrel takes control of the bullet and pressure. It is however a good way to understand the velocity gain in actual barrel length. A good example of the difference in this way of measuring effective barrel length would be the difference in a 7 mm short magnum and a standard 7 mm rem magnum with the same barrel length from the bolt face to the muzzle. The difference is 0.409 in actual effective length. Not much, but a 1/2 inch can increase the velocity with all things being equal. with even shorter cartridges, the effective barrel length can be more The 7 mm BR would be more than 1.500 inches longer than the 7 rem mag in the same length. So the right/universal way to measure the barrel length that best fits all cartridges is the bolt/ breach face to the muzzle. 👍 J E CUSTOM [/QUOTE]
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How to measure barrel length?
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