.280 ackley build

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by bigairbear, Jul 6, 2013.

  1. bigairbear

    bigairbear Member

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    I have a Shilen #5 1:9 .284 barrel on the way(3-4 months). It will be reamed out for the .280 ackley. I am having it put on my model 70 extreme weather .30-06. I plan on having somewhere just short of the velocity of a 7mm rem mag since I have a custom built 7 mag with a 26 inch tube and don't quite need the same ballistics of that rifle. I am not familiar with the ackley but really impressed with what I've read and am excited to try it out, especially since my model 70 holds 5 in the mag vs. 3! So my question is, "at what length should I have the tube shaved off at to achieve good velocity without going too long?" I was thinking 24" would be appropriate but I just don't have any experience with this setup. I will pry be running a 160 accubond through it if that helps.
     
  2. MudRunner2005

    MudRunner2005 Well-Known Member

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    When I build mine it will have a 26" finished length barrel on it.

    Not sure on the 24 vs 26 velocities....Wish I could help more. Hopefully some others can chime in to help.
     

  3. bigairbear

    bigairbear Member

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    Well that is always an option since the barrel will be shipped at 26". What kind of velocities are you getting? and what grain bullets are you shooting?
     
  4. MudRunner2005

    MudRunner2005 Well-Known Member

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    I don't have one yet.....I have started my build, but this is all I've got so far... :D

    [​IMG]

    New stainless Remington 700 action, and a stainless PTG 0.200" recoil lug.

    I still have to order my barrel, stock, bottom metal, and get the cash to pay my smith for labor.

    I plan on going with a Rock Creek 5R 1:9 blank, finished out to 26".

    I handload, and will be mainly shooting Berger VLD 168 bullets. But I also plan on working up loads for the Berger 180 VLD's, and for the Nosler 160 Accubonds.
     
  5. rharfo

    rharfo Well-Known Member

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    It doesn't need 26 to get full burn of the powder like a RUM type cartridge. Depending on your desire to make the rifle a bit more "handy" and keep over all weight down I would go 24". I have a Dakota in 24 and a Red Hawk Rifle due to be shipped any day in a 24. Most 7 Rem mags are 24 and you should get within 100 fps of the mag.
     
  6. bigairbear

    bigairbear Member

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    Seems to me everyone is running a 1:9 so I feel pretty safe there, that's good to see. I also handload but will probably save up some nosler ackley brass from the get go by shooting factories for a while. I plan on sticking with the 160 accubond though once I get around to it. I like the accubonds and had good luck on deer with them in my 270wsm. rharfo, if you think I can get those numbers with a 24" then that's pry what I'll have it cut to. That would split the difference nice betweer a long 26" and a 22" barrel. Thanks for the info guys, and good luck with that build MudRunner.
     
  7. MudRunner2005

    MudRunner2005 Well-Known Member

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    Thanks, same with yours. Keep us posted on yours.
     
  8. bigairbear

    bigairbear Member

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    Most definitely
     
  9. TrophyHunter_colorado

    TrophyHunter_colorado Well-Known Member

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    This is cool, i'm having a 280 AI built for my wife this year. Should be back from the smith next month.

    #3 Brux 1:9 finish at 25"
    trued and blueprinted rem action
    B&C Alaskan stock scim bedded
    KDF sniper brake.

    Planning on berger 168 but will also test 180's but don't know if they will stabilize in a 1:9.
    of corse I will try to get some new accubonds but not going to hold my breath
     
  10. MudRunner2005

    MudRunner2005 Well-Known Member

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    180's will stabilize just fine in a 1:9 twist. You'll be good to go. I shoot 180's out of my Sendero SF 7mmSTW and it has a 9.25" twist 26" barrel. Shoots some very tight groups.
     
  11. TrophyHunter_colorado

    TrophyHunter_colorado Well-Known Member

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    sweet that is what I like to hear! will just dive in to the big dogs right off the bat thanks for the update!
     
  12. MudRunner2005

    MudRunner2005 Well-Known Member

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    Personally, I perfer the 168's in my 7mm RemMag, and will be mainly shooting 168's in my .280 AI once I get that build finished. The 180's are zinging out of my STW around 2,900 fps right now, so I think I'll keep those just for them. However, I will STILL be developing a 180 load for the .280 AI, since you never know when you might just feel the urge to load up some heavies and go long-range shooting on some whitetails. :D
     
  13. bigairbear

    bigairbear Member

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    Well Shilen called yesterday and it looks like my barrel is on it's way! Hopefully my gunsmith is ready for me soon. They said 3-4 months but it ended up being 3-4 weeks instead. I wasn't quite ready for it but hey. I am just excited to have a winchester action with close to 7 mag ballistics and 5 rounds in the mag. Hopefully it's a shooter. I will post pics once it's here. might take a bit though.
     
  14. stanley52

    stanley52 Well-Known Member

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    I am building a 280 AI also. Blueprinted 700 action with a Bartlein M24 (.9 muzzle) 26" finish, holland .25 pinned recoil lug, timney trigger, and a manner MCS-T2A, NF scope base, badger rings, and viper vortex pst 4-16, atlas bipod.

    I asked the same question the other day about barrel length, and from everything everyone said, and everything I could read, 26" is the most efficient option. I do think a 24" will definitely work, but an '06 needs about a 24-26" since its a longer cartridge and has more powder space than a .308, it takes longer to burn the powder up, since a 280 is a necked down '06, It is logical to assume it could even take more barrel length to burn all the powder efficiently.

    Just my 2 cents though.