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Rifles, Reloading, Optics, Equipment
Reloading
How to match powder to barrel length?
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<blockquote data-quote="MagnumManiac" data-source="post: 2441073" data-attributes="member: 10755"><p>In reality there is no formula for barrel length and powder burn rate that works until extremes in both long and short come into play.</p><p>A 22rf works most efficiently at 18", the pressure at the muzzle at bullet release is highest. Move to a 24" barrel and pressure and velocity has dropped. Now we can't change the powder used in a 22rf, but we can tune with barrel length.</p><p>Unfortunately, due to the nature of the PROGRESSIVE nature of the powders we use mostly, except ball powder which is DIGRESSIVE, barrel length plays almost no role in the outcome.</p><p>[USER=116181]@QuietTexan[/USER] summed it up very well with his description.</p><p>It is the cartridge size, bore size and the Expansion Ratio that determines what powders work efficiently, not the barrel lengths because the same powder in a short barrel will also give the highest velocities as used in a long barrel.</p><p>Every reloading manual will show you this.</p><p>Those powders listed at the top with the highest velocities are the same one's across the board that burn at the most efficient utilising that Expansion Ratio regardless of barrel length, short or long.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2441073, member: 10755"] In reality there is no formula for barrel length and powder burn rate that works until extremes in both long and short come into play. A 22rf works most efficiently at 18”, the pressure at the muzzle at bullet release is highest. Move to a 24” barrel and pressure and velocity has dropped. Now we can’t change the powder used in a 22rf, but we can tune with barrel length. Unfortunately, due to the nature of the PROGRESSIVE nature of the powders we use mostly, except ball powder which is DIGRESSIVE, barrel length plays almost no role in the outcome. [USER=116181]@QuietTexan[/USER] summed it up very well with his description. It is the cartridge size, bore size and the Expansion Ratio that determines what powders work efficiently, not the barrel lengths because the same powder in a short barrel will also give the highest velocities as used in a long barrel. Every reloading manual will show you this. Those powders listed at the top with the highest velocities are the same one’s across the board that burn at the most efficient utilising that Expansion Ratio regardless of barrel length, short or long. Cheers. [/QUOTE]
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How to match powder to barrel length?
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