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Does accuracy degrade with increased speed in a sporter weight barrel?

Discussion in 'Rifle Country' started by GJgo, Oct 13, 2008.

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  1. GJgo

    GJgo Member

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    What do you guys think? In both my sporter weight rifles, they like the heavier bullets at around 3000 FPS for accuracy. When I go to a lighter bullet with more velocity the groups fall off.

    Come to think if it, even in my heavy barrel rifles they seem to shoot better wth heavy-for-the-twist bullets. (as opposed to "too" heavy for the twist.) I can say that this is true for everything I own and have owned, except for the two 223s I've had with a 9 twist- they shot 50/55gr better than 68/69.

    It's just something I was thinking about tonight.
     
  2. SimpleIsGood229

    SimpleIsGood229 Member

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    I think your rifles just favor heavier bullets. I highly doubt it's velocity-related.
     
  3. browningguy

    browningguy Member

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    Nope, one has nothing to do with the other. Every barrel is going to be just a little bit different, but if you take the entire population of sporter weight barrels, they will display a marked difference in ammo preference. Although it will probably wind up being something of a bell curve as regards preferred weight of bullet and velocity.
     
  4. trstafford

    trstafford Member

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    Reload

    That is why reloaders vary the powder charges until they get the optimum loading for each particular gun. It is a combination of the right speed and harmonics for each barrel.
     
  5. Double Naught Spy

    Double Naught Spy Sus Venator

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    This is a twist rate issue. Your 68/69 gr. ammo would prefer a faster twist rate than your 50/55 gr. ammo.
     
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