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270 Winchester Ackley Improved Load Data

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  #1  
Unread 11-30-2010, 02:37 PM
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270 Winchester Ackley Improved Load Data

270 Winchester Ackley Improved

Can anyone Help me on Load Data on the .270 Win Ackley Improve? There is not a lot of information out there about this wildcat. I plan on shooting 110,130, 140,150 Bullet I canít find any info on this.

If you have a P.O Ackley Book can you Scan the .270 A.I section for me I will appreciated it.



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  •   #2  
    Unread 11-30-2010, 04:14 PM
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    Re: 270 Winchester Ackley Improved Load Data

    Isn't much, but maybe worth a look: .270 Ackley @ www.reloadersnest.com

    Tank
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      #3  
    Unread 11-30-2010, 08:14 PM
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    Re: 270 Winchester Ackley Improved Load Data

    You can use max loads from the parent case [270win] as starting loads to work from, i think most recomend at least 75% case capacity. ed
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      #4  
    Unread 11-30-2010, 09:28 PM
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    Re: 270 Winchester Ackley Improved Load Data

    Quote:
    Originally Posted by tunered View Post
    You can use max loads from the parent case [270win] as starting loads to work from, i think most recomend at least 75% case capacity. ed
    Thanks you all for the info I have been comparing all Ackley loads with standard loads and it seems that from the max load add 6grains and that will be your max load but of course start with a safe load that will be the max load from a standard load.
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      #5  
    Unread 01-12-2011, 03:28 AM
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    Re: 270 Winchester Ackley Improved Load Data

    What were your results? I would like to turn my 270 into an improved.
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      #6  
    Unread 01-12-2011, 07:24 PM
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    Re: 270 Winchester Ackley Improved Load Data

    Ackley says it is not worth doing there for there is no data for it in his book. I can tell you that the 270 Win. has a case capicity of 4.36 cc and that the improved has a case capicity of 4.4 cc. With a difference of only .04 cc you are talking about an increase in powder charge to equal the same presure would be .1 gr at max. That siad the 270 is a very good round in it`s own right and if you have a custom rifle it`s probly a good shooter, besides that your probly the only one on your block that has one.
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      #7  
    Unread 01-13-2011, 03:08 PM
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    Re: 270 Winchester Ackley Improved Load Data

    What I can't understand is how badly the 270 improved is trashed, by people who don't own them, and the 280 AI is lauded.

    They should be nearly identical. The 270 win has had a slight edge over the 280 with 140gr. The increase in performance according to some sources by making a 270 improved is 7.8%, the 280's improvement in performance is rated at 7.7%.

    So how can one be a piece of crap and the other the best thing since sliced bread?

    I understand there are heavier bullet choices in the 7mm, but as for shooting Nosler accubonds or ballistic tips, the bullets are too similar to differentiate.

    It seems the people with them love them, and I think I am going to give it a try. IMR 7828 and a few others have breathed new life into the "overbore category", and I think the debate isn't over. So I'll spend a few dollars to make a fool of myself.

    My current load in the 270 win with a 26" Douglas Airguage bbl, runs the 140gr nosler ballistic tip out the barrel at 3200fps with 60 gr of H4831. A hot load, but not rediculous. Use at your own risk. The same load will hold 3012 fps with a 22" barrel. I think the inclusion of a few more grains of powder-in a more effecient burning cartridge AND the 26" barrel will be a really cool long range weapon.
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