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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Which type of barrel lasts longer in 300 Win Mag?
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<blockquote data-quote="Bart B" data-source="post: 1133203" data-attributes="member: 5302"><p>Two top ranked barrel makers have told me heat and pressure wear out barrels more than anything else. Rate of fire doesn't mean much until it starts getting more than 10 shots per minute.</p><p></p><p>Any good quality barrel will not bend and change point of impact as it heats up if it's fit correctly to the receiver. Virtually all commercial factory rifle barrels are not fit correctly so they're the ones fostering the belief that all barrels change point of bullet impact as the heat up.</p><p></p><p>Barrel life increases about 15% if you use 10% reduced loads. That would reduce a .300 Win Mag's bullets to about that of a .30-06. You could shoot 180's from a .30-06 at 2700 fps with a max load equalling about what a 10% reduction in a .300 Win Mag. load's velocity with them would be. Barrel life for the .30-06 would be 2500 rounds compared to the .300's 1300 round barrel life. Max loads with the .300 Win Mag yields about 1100 rounds of very accurate barrel life</p><p></p><p>I've seen no difference in .308 Win barrel life shooting 155's out at 3000 fps compared to 168's through 200's being shot out at 2500 to 2700 fps.</p><p></p><p>Yes, start with a long barrel. Wear out a 29" or 30" one then have it set back 3" and rechambered and you'll get almost the same life as the original one. And keep muzzle velocity up where 300 Win Mags typically have.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1133203, member: 5302"] Two top ranked barrel makers have told me heat and pressure wear out barrels more than anything else. Rate of fire doesn't mean much until it starts getting more than 10 shots per minute. Any good quality barrel will not bend and change point of impact as it heats up if it's fit correctly to the receiver. Virtually all commercial factory rifle barrels are not fit correctly so they're the ones fostering the belief that all barrels change point of bullet impact as the heat up. Barrel life increases about 15% if you use 10% reduced loads. That would reduce a .300 Win Mag's bullets to about that of a .30-06. You could shoot 180's from a .30-06 at 2700 fps with a max load equalling about what a 10% reduction in a .300 Win Mag. load's velocity with them would be. Barrel life for the .30-06 would be 2500 rounds compared to the .300's 1300 round barrel life. Max loads with the .300 Win Mag yields about 1100 rounds of very accurate barrel life I've seen no difference in .308 Win barrel life shooting 155's out at 3000 fps compared to 168's through 200's being shot out at 2500 to 2700 fps. Yes, start with a long barrel. Wear out a 29" or 30" one then have it set back 3" and rechambered and you'll get almost the same life as the original one. And keep muzzle velocity up where 300 Win Mags typically have. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Which type of barrel lasts longer in 300 Win Mag?
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