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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
What kills barrel life on bigger magnums?
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<blockquote data-quote="Michael Eichele" data-source="post: 893400" data-attributes="member: 1007"><p>I'm glad you indicated a straight apples to apples comparison because if dwell time was the only factor, a 300rum running 150s would out live a 308 running 150s. But we all know the reality here.</p><p></p><p>I tend to agree with you. I recently performed an 'arc flash study' for some electrical systems recently. One thing I learned was that the intensity of an arc flash (an electrical fault caused by the ionization of air around electrical terminals or busses which is hotter than the surface of the sun) compared to the severity are two totally different things. Intensity is how big and hot the flash but the severity accounts for the duration of the arc. An arcing current of 4000 amps with a .04 second duration is A LOT less severe than an arcing current of 2000 amps that lasts .4 seconds. Time here is the difference between curable 2nd degree burns to humans verses non curable burns. I guess the same principal could be applied to the inside of a barrel.</p><p></p><p>I also know from first hand experience that carbon rings kill barrels. These will definitely increase pressure. You have to keep caked on carbon to a minimum. Especially in the throat area which can and will dramatically increase pressure when the bullet slams into that tight spot. The more 'over-bore' the cartridge, the faster and more severely the carbon rings develop. They don't come out with standard cleaning practices either so when you think your barrel is clean, you may still have remnants which just keep getting worse.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 893400, member: 1007"] I'm glad you indicated a straight apples to apples comparison because if dwell time was the only factor, a 300rum running 150s would out live a 308 running 150s. But we all know the reality here. I tend to agree with you. I recently performed an 'arc flash study' for some electrical systems recently. One thing I learned was that the intensity of an arc flash (an electrical fault caused by the ionization of air around electrical terminals or busses which is hotter than the surface of the sun) compared to the severity are two totally different things. Intensity is how big and hot the flash but the severity accounts for the duration of the arc. An arcing current of 4000 amps with a .04 second duration is A LOT less severe than an arcing current of 2000 amps that lasts .4 seconds. Time here is the difference between curable 2nd degree burns to humans verses non curable burns. I guess the same principal could be applied to the inside of a barrel. I also know from first hand experience that carbon rings kill barrels. These will definitely increase pressure. You have to keep caked on carbon to a minimum. Especially in the throat area which can and will dramatically increase pressure when the bullet slams into that tight spot. The more 'over-bore' the cartridge, the faster and more severely the carbon rings develop. They don't come out with standard cleaning practices either so when you think your barrel is clean, you may still have remnants which just keep getting worse. [/QUOTE]
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What kills barrel life on bigger magnums?
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