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Thread: .308 ackley improved

  1. #1
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    Default .308 ackley improved

    Has anyone had any experience with the .308 Ackley Improved ? I want to build a hunting rifle off a cartridge that is readily available and I already have 2 .308's - I lost my Ackley reference books so I'm asking for feedback before I embark on a 30/06 AI - thank you

  2. #2
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    back country-

    Little confused. Are you looking for info on a 308 Win AI, a 30/06 Springfield AI, any 308 caliber AI rounds or a combo of all three? I shoot/handload the following AI rounds:

    243 Win AI
    6mm Rem AI
    25/243 Win AI
    260 Rem AI
    257 Roberts AI (in the process of building one of these)
    7mm/08 Rem AI
    280 Rem AI (two differant rifles)
    30/06 Spring AI (three differant rifles)
    300 H&H AI
    375 H&H AI

    Of the nine AI's I load for the 30/06 Spring AI and the 375 H&H AI are my favorites. I feel you gain the most velocity over the parent cartridges. My most accurate rounds though are my 280 AI's and my 7mm/08 AI's. All but two of the above rifles are chambered with Lilja or Krieger barrels built on Sako AII's, Remington 700 Titaniums, standard Rem 700's and Kimber 84 Montana's. The 375 and two of my 30/06 AI's are the ones built on the factory Rem 700 barreled actions.

    I thought of building a 308 win AI, but the info I got, and the parent case size, I did not feel that the velocity gain was worth the trouble.

    The three 30/06 AI's are shooting the exact same load of H4831 SC (63grs)/Feberal 210M primer but the bullets are the following, 165gr Nosler AB (Lilja 23" 3-groove barrel at 2987 fps), 165gr Nosler BT (factory 22" Rem 700 Barrel 2922 fps), and a 168gr Nosler BT (factory 22" Rem 700 Barrel 2940 fps)

    What action/barrel do you plan on using for your rifle build? Let me know any more questions you might have. Take care

  3. #3
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    Hello - thank you for your response - I have worked with .223 AI - .243 AI - .257 AI - .270/08 AI - .300 Mag AI and I love all of them - I have 2 Montana .308 and have admittedly fallen in love with the combo - I hadn't heard anything about the .308 being improved and was just looking for feedback, there are other things ie: low case stretch and that you can shoot factory rounds in an AI chamber but there is some work involved with them, no question about that - I am inclined to just rechamber one of my Montana's if I could "expect" to gain 5% which I doubt can be safely done (using 150 moly coated accubonds as I am now getting right at 2900 fps)

  4. #4
    Member pinehavensredrocket's Avatar
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    i own several AI's and like the .280 and 30-06 best ( they also show the greatest improvement ). the case shoulder determines the amount of "extra" capacity, and as the .308 is at 20degrees vs 17 degrees the improvement will be less.

    actually HE factory loads in hornady light mag, superformance, federal HE will surpass AI ballistics. this may change as new powders become available. good luck.
    happy trails.
    jh

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