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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Decrease throat erosion with longer barrels?
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<blockquote data-quote="Michael Eichele" data-source="post: 815887" data-attributes="member: 1007"><p>IMHO, longer barrels only help you gain velocity by giving you more burn area volume to burn more powder (more of a slower burning powder) thus increasing your velocity potential. All else being equal, I feel adding barrel length only adds friction that slows bullets down. Imagine a 100 foot long barrel chambered in 308 win. Would the bullet even exit the barrel? </p><p></p><p>If you start with a 30" barrel, work up a load that is optimum for your barrel/bullet/powder combo, then cut 2" off, you will loose some velocity. Adding more of the same powder may bring your velocity up but the powder/barrel length/etc...is no longer optimal. Using a faster powder solves this problem. You get your velocity back and optimize your load/barrel relationship. This is just an illustration of my point. All this said, shortening your barrel and using faster powders may be the way to increase throat life as adding barrel length increases the time the bullet is in the barrel adding to the duration of heat and flame exposure to the throat. Honestly, I think you're barking up the wrong tree.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 815887, member: 1007"] IMHO, longer barrels only help you gain velocity by giving you more burn area volume to burn more powder (more of a slower burning powder) thus increasing your velocity potential. All else being equal, I feel adding barrel length only adds friction that slows bullets down. Imagine a 100 foot long barrel chambered in 308 win. Would the bullet even exit the barrel? If you start with a 30" barrel, work up a load that is optimum for your barrel/bullet/powder combo, then cut 2" off, you will loose some velocity. Adding more of the same powder may bring your velocity up but the powder/barrel length/etc...is no longer optimal. Using a faster powder solves this problem. You get your velocity back and optimize your load/barrel relationship. This is just an illustration of my point. All this said, shortening your barrel and using faster powders may be the way to increase throat life as adding barrel length increases the time the bullet is in the barrel adding to the duration of heat and flame exposure to the throat. Honestly, I think you're barking up the wrong tree. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Decrease throat erosion with longer barrels?
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