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Rifles, Reloading, Optics, Equipment
Reloading
Barrel length and twist rate
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<blockquote data-quote="Pdyson" data-source="post: 2790164" data-attributes="member: 74061"><p>Yes, it is MV not barrel length determines RPM. But barrel length directly affects MV. The twist rate and velocity together affect RPM of the bullet. Longer barrels can increase the RPM by increasing the muzzle velocity but not enough to overcome a twist rate which is too slow to begin with. It might work if you are marginal but if you are going to fit a new barrel, get one with the right twist rate.</p></blockquote><p></p>
[QUOTE="Pdyson, post: 2790164, member: 74061"] Yes, it is MV not barrel length determines RPM. But barrel length directly affects MV. The twist rate and velocity together affect RPM of the bullet. Longer barrels can increase the RPM by increasing the muzzle velocity but not enough to overcome a twist rate which is too slow to begin with. It might work if you are marginal but if you are going to fit a new barrel, get one with the right twist rate. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Barrel length and twist rate
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