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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel length and velocity?
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<blockquote data-quote="Bart B" data-source="post: 790708" data-attributes="member: 5302"><p>In the SAAMI tests with barrels from 22 to over 30 inches and bullets in the 2500 to 3000 fps range, muzzle velocity increased about 25 to 30 fps per inch of increased length. SAAMI's web site has documents on centerfire rifle cartridges documenting this.</p><p></p><p>Unless the barrels one uses to compare muzzle velocity have the exact chamber, bore and groove dimensions as well as firing pin and ammunition properties, the velocity numbers for each length will not be good for comparison.</p><p></p><p>Exactly how does one measure or calculate the "efficiency" of a load for a given barrel?</p></blockquote><p></p>
[QUOTE="Bart B, post: 790708, member: 5302"] In the SAAMI tests with barrels from 22 to over 30 inches and bullets in the 2500 to 3000 fps range, muzzle velocity increased about 25 to 30 fps per inch of increased length. SAAMI's web site has documents on centerfire rifle cartridges documenting this. Unless the barrels one uses to compare muzzle velocity have the exact chamber, bore and groove dimensions as well as firing pin and ammunition properties, the velocity numbers for each length will not be good for comparison. Exactly how does one measure or calculate the "efficiency" of a load for a given barrel? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel length and velocity?
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