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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Barrel length and powder burn rates?
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<blockquote data-quote="J E Custom" data-source="post: 287261" data-attributes="member: 2736"><p>I think AJ cleared up the one issue very well so I will give you my opinion on your last question.</p><p></p><p>If you break it down to case capacity it is simple.</p><p></p><p>Cases that hold less than 50 grs of powder do well with short barrels, Because in order to reach</p><p>maximum pressures and velocities they use Fast burning powders and the gain per inch of</p><p>barrel over 20 to 22"inches is minimal .</p><p></p><p>Cases that hold less than 75 grs of powder are at there best when medium to slow burn rate </p><p>powders are used with 24" to 26" barrels 28 to30'' barrels can contribute to some increase in</p><p>velocity.</p><p></p><p>Cases that hold 75 to 100grs are at there best using slow burning powders and 26" to 30"in</p><p>barrels.</p><p></p><p>Cases that hold more than 100 grs of powder Need the slowest powders and can benefit from</p><p>30"inch + barrels . the maximum practical length that should be used is 34" inches because of </p><p>weight and performance.</p><p></p><p>The 300 win mag falls into the 75 gr group and 24" barrels would be considered the minimum</p><p>effective barrel length.</p><p></p><p>The 308,7/08 size cases work well with 18 to 20" barrels and are very portable, They like faster</p><p>burning powders like 4350,414,4064 and Varget.</p><p></p><p>There is one exception to this and it is the big bores (.375 and up ) they can burn huge amounts of</p><p>faster burning powder because of surface diameter of the bullets. But again they can and do use </p><p>short barrels.</p><p></p><p>There are a lot of cartridges that will work with 22" barrels ,and with the introduction of the short</p><p>magnums you can build a rifle that is short AND powerful,And because the short action saves</p><p>in overall length and uses less of the bore when chambered you can have a barrel 23" and have</p><p>the overall rifle length very short and handy. </p><p></p><p>I hope this answers your other question</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 287261, member: 2736"] I think AJ cleared up the one issue very well so I will give you my opinion on your last question. If you break it down to case capacity it is simple. Cases that hold less than 50 grs of powder do well with short barrels, Because in order to reach maximum pressures and velocities they use Fast burning powders and the gain per inch of barrel over 20 to 22"inches is minimal . Cases that hold less than 75 grs of powder are at there best when medium to slow burn rate powders are used with 24" to 26" barrels 28 to30'' barrels can contribute to some increase in velocity. Cases that hold 75 to 100grs are at there best using slow burning powders and 26" to 30"in barrels. Cases that hold more than 100 grs of powder Need the slowest powders and can benefit from 30"inch + barrels . the maximum practical length that should be used is 34" inches because of weight and performance. The 300 win mag falls into the 75 gr group and 24" barrels would be considered the minimum effective barrel length. The 308,7/08 size cases work well with 18 to 20" barrels and are very portable, They like faster burning powders like 4350,414,4064 and Varget. There is one exception to this and it is the big bores (.375 and up ) they can burn huge amounts of faster burning powder because of surface diameter of the bullets. But again they can and do use short barrels. There are a lot of cartridges that will work with 22" barrels ,and with the introduction of the short magnums you can build a rifle that is short AND powerful,And because the short action saves in overall length and uses less of the bore when chambered you can have a barrel 23" and have the overall rifle length very short and handy. I hope this answers your other question J E CUSTOM [/QUOTE]
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Barrel length and powder burn rates?
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