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1000 Yard .308 Reloading

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  #8  
Unread 01-15-2013, 04:14 PM
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Re: 1000 Yard .308 Reloading

The following's good info on .308 Win. loads for 22 inch barrels at longer ranges. Note some of them are way over max safe SAAMI pressures, but they worked well in M14's

The Rifleman's Journal: Cartridges: 7.62 NATO Long Range Match Cartridges - Part 1

The Rifleman's Journal: Cartridges: 7.62 NATO Long Range Match Cartridges - Part 2

Over the years, one load's been popular and if it doesn't work in your barrel, you may need another barrel or your barreled action refit (bedded?) in the stock. And the shooter may well need to be replaced, too. 43 grains of IMR4064 under a 175 Sierra HPMK with the bullet seated to touch the lands when chambered. 42 grains if IMR4895's been a close second. Sierra's 168's and 180's in HPMK style are not too good for the longer ranges; they tend to go subsonic before 1000 yards when fired from .308 Win. cases. I doubt you can shoot 155's fast enough (3000 fps) out the muzzle of a .308's 22 inch barrel; they need to leave that fast to remain supersonic in most atmospheric conditions.

Wolff large rifle primers are among the best for accuracy. So are commercial cases. Full length size your fired cases correctly. Ensure your rifle's firing pin is up to factory specs; weak ones cause poor accuracy at the longer ranges as velocity spread will be too great.

Bullets need to be a few ten thousandths inch bigger than groove diameter for best accuracy. Slug your bore then compare the lead ball's diameter to what your bullets are. If the bullets are smaller than the barrel's groove diameter, don't expect great accuracy, but it might happen.
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  •   #9  
    Unread 01-15-2013, 04:32 PM
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    Re: 1000 Yard .308 Reloading

    I've been leading towards the 175-178 grain round. Around 2700 fps. I think that would be somewhere around 42.5-43 grains of powder from what I've read. I'm going to have to double check the Miller stabilization number of the 178 gr Hornady A-Max round as well.
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      #10  
    Unread 01-15-2013, 05:49 PM
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    Re: 1000 Yard .308 Reloading

    Quote:
    Originally Posted by emn83 View Post
    what's the length on the bbl? That's some pretty impressive speed
    His barrel is 24". Note we are also shooting at 5800 feet.
    He pulled his original load back from 46.0 grains as he was seeing done pressure signs.
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    AR's for coyotes
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      #11  
    Unread 01-15-2013, 05:54 PM
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    Re: 1000 Yard .308 Reloading

    Quote:
    Originally Posted by MTBULLET View Post
    i would recommend visiting with some bench rest/palma/high power shooters at your local range first, BEFORE trusting any "some one" or"my buddy shoots" info. The trick is not so much "super sonic" as "mach speed" at that range, I use mach 1.2 as my MINIMUM speed for accuracy at that range.
    My post was to lend some guidance. As always, work up a load in your rifle and stay within the limits. I shoot weekly out to 800 and have been thru many loads, calibers etc. Also reference accurateshooter.com.
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    AR's for coyotes
    25-06 M70 for coyotes
    6.5-06 Remington Custom w/Leupold Mark IV 6.5-20 tactical setup
    AR10 for mule deer
    6.5-06 M700 for mule deer
    338 Lapua Mag M700 for elk
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      #12  
    Unread 01-27-2013, 02:49 PM
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    Re: 1000 Yard .308 Reloading

    this load is for my gun. Its a 5r mil spec 1 in 11.25 twist.

    lapua brass
    44 grains rl 15
    178 hornady bthp match
    210 match primers
    coal 2.860
    4k of neck tension

    this load shoots stable to 1200 yards in the summer and 1100 in the winter here in az. mv from my oehler 35p 2725

    as always work up your own load
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      #13  
    Unread 01-27-2013, 03:21 PM
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    Re: 1000 Yard .308 Reloading

    Quote:
    Originally Posted by srlamy View Post
    this load is for my gun. Its a 5r mil spec 1 in 11.25 twist.

    lapua brass
    44 grains rl 15
    178 hornady bthp match
    210 match primers
    coal 2.860
    4k of neck tension

    this load shoots stable to 1200 yards in the summer and 1100 in the winter here in az. mv from my oehler 35p 2725

    as always work up your own load
    That sounds about right, but I'm guessing the Lapua brass can probably withstand a little more pressure than most other brass on the market.

    If this load is coming out at 2725 from a 20" barrel, it would probably be a little too hot for my 22" barrel, so I'd probably only load 43 grains (start with 42.5 and work my way up). I'll be sticking with RL15 powder as well.
    __________________
    Weatherby Vanguard .308
    -Millett TRS-1 4-16x50 with Burris rings
    -Talley 20 MOA base
    -Boyd's pepper laminate stock
    -Score High bedding pillars
    -Score High glass bedding
    -Tactical Works krydex cheek rest
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      #14  
    Unread 01-27-2013, 08:29 PM
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    Re: 1000 Yard .308 Reloading

    RL-17 is the new powder on the block, shooting a 180gr at 2742 on a 22" barrel with 210M...
    This is a sporter barrel.
    Luck to you.....
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