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Thread: 6.5x55 barrel length

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  1. #1
    By Popular Demand gimp's Avatar
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    Quote Originally Posted by dogmatix View Post
    18.5" is too short for a 6.5x55 in my mind, prob okay for a .260.
    this doesn't make sense either

  2. #2
    Member dogmatix's Avatar
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    Quote Originally Posted by gimp View Post
    this doesn't make sense either
    What?
    That a 6.5x55 shooting a 140gn projectile with ADI 2209 through a 18.5" barrel might only be doing 2200fps, going to a faster powder away than the 2209 burn rate is not ideal for the cartridge.
    Versus a 260, which could use a faster powder such as 2206H for the 140gns, so you could go with a shorter barrel and make up for lost velocity with tweaking the loads more.

    Seems pretty basic to me.
    Last edited by dogmatix; 25-06-2015 at 07:27 PM.
    Welcome to Sako club.

  3. #3
    By Popular Demand gimp's Avatar
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    Quote Originally Posted by dogmatix View Post
    What?
    That a 6.5x55 shooting a 140gn projectile with ADI 2209 through a 18.5" barrel might only be doing 2200fps, going to a faster powder away than the 2209 burn rate is not ideal for the cartridge.
    Versus a 260, which could use a faster powder such as 2206H for the 140gns, so you could go with a shorter barrel and make up for lost velocity with tweaking the loads more.

    Seems pretty basic to me.
    It's just not correct

    More like 2600 with 2209 dude

    2745 with 2209 and 140gr from 20 inch 6.5x55


    a bigger case = more speed, always. the difference between a bigger case and a smaller case decreases with a shorter barrel, but bigger pretty much always = faster


    2206H sucks shit in a .260, it's never faster than 2209 with a 140 down to like a 4 inch barrel if loaded to the same pressure

 

 

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