which barrel lasts the longest 270wsm or 7mm mag

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by Elkwonder, Nov 28, 2010.

  1. Elkwonder

    Elkwonder Well-Known Member

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    Title says it all, given everything equal, which one lasts longer before needing rebarreled?
     
  2. bigngreen

    bigngreen Well-Known Member

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    A 270 WSM barrel will run in the 1200 rnd range then start to slow down, in my experience, some will be less some more but I did run loads HOT. Don't know with the 7mm, haven't found one worth keeping that long.
    Next barrel is getting Nitride.
     

  3. threejones

    threejones Well-Known Member

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    My old man shoots a remmy700 7mm, loads em up fairly hot, and gets alittle less than 1000 rounds per barrel. I think he's just using factory barrels, but I'm not sure.
     
  4. johnnyk

    johnnyk Well-Known Member

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    I got about 1200-1300 rds out of the first 7mm RemMag Sendero that I owned. The accuracy was still under 1/2" but cleaning took hours. Traded it for a 700P, same caliber.
    I don't see a huge difference in the two cartridges. .007" difference in diameter. The .270WSM holds 78.9gn of water, the 7Mag, 83.2gn. That's 4.3gns difference. Not alot of barrel scorching difference. JohnnyK.
     
  5. elkaholic

    elkaholic Well-Known Member

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    +1 on Johnny. The 7 mag has a little longer neck but less shoulder angle so it should be a wash there as well.....Rich
     
  6. Long Time Long Ranger

    Long Time Long Ranger Well-Known Member

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    I haven't shot the 270 wsm but looking at case size vs going down in caliber I would say it is a wash. That is a very educated guess.