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6mm Remington vs 6mm Ackley

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  #1  
Unread 08-08-2011, 05:39 PM
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6mm Remington vs 6mm Ackley

I have a 1 in 8 twist 6mm Remington with a 29" barrel which I have considered improving and lengthening the throat on. This is my long range coyote rifle, which I would like to make as flat shooting and wind defying as reasonably possible out to around 700 yards. I am currently shooting 105 Amax at 3200 fps. Is the "improvement" worth it? The rifle is built on a standard Model 70 action, so I have plenty of room.
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  •   #2  
    Unread 08-08-2011, 07:11 PM
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    Re: 6mm Remington vs 6mm Ackley

    Its worth it for case life, due to having to work the brass less. You can also step it up by switching bullets like 107SMKs, 105 Bergers, or 115 DTACs they all have higher bc's than the 105 A-MAX's.
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      #3  
    Unread 08-08-2011, 09:50 PM
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    Re: 6mm Remington vs 6mm Ackley

    Quote:
    Originally Posted by Mack Hunt View Post
    I have a 1 in 8 twist 6mm Remington with a 29" barrel which I have considered improving and lengthening the throat on. This is my long range coyote rifle, which I would like to make as flat shooting and wind defying as reasonably possible out to around 700 yards. I am currently shooting 105 Amax at 3200 fps. Is the "improvement" worth it? The rifle is built on a standard Model 70 action, so I have plenty of room.

    Like said: Case life will go up. how about these high BC vld 107 and 117

    .243 Caliber Bullets Custom Built for Accuracy | Matrix Ballistics
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    .270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.
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      #4  
    Unread 08-09-2011, 07:54 AM
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    Re: 6mm Remington vs 6mm Ackley

    I shoot a 6mm Crusader, GAP's version of the 6mm AI. It has a gain twist barrel, starts at 9 and ends in 8. Incredible shooter ! 105 amaxes at 3355 fps here at 4650 asl.





    5 shot group with the 105 Amax. shoots like this all the time !




    The 105 performs incredible, you can always find them to buy them... great on paper and critters !

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      #5  
    Unread 08-09-2011, 08:28 AM
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    Re: 6mm Remington vs 6mm Ackley

    Fireforming is the only down side to the 6mmAI, wonderful cartridge & probably one of the easiest to reload for in my arsenal. I made the mistake of putting on a slow twist barrel (1-12) so I cannot comment on the heavies, I can say that the 90's & less often shoot the bugholes Sendero_Man has shown. The one mod I had to do to was modify the feed lips of the mag, it was originally chambered in 243, then 243AI then 6mmAI (Savage 110), I had to adjust the feed lips to feed properly, there was a "pinch point" near the case shoulder that was starting to become a pain as it would allow a round to jump out of the mag every once in a while, I pulled the mag while I was bedding the new stock & made some minor adjustments with hand tools, basically just taking the taper out of the mag, works just fine now all for 10mins of work.

    As stated in the Sierra 5th edition "....out of all of ackley's designs, this is one of the better ones..."

    You won't be sorry.
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      #6  
    Unread 08-09-2011, 09:04 AM
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    Re: 6mm Remington vs 6mm Ackley

    Thank you all for the information. I will check out the GAP version and compare. That is a great looking rifle Sendero Man and very impressive groups. What sold you on the GAP version verse the Ackley version?
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      #7  
    Unread 08-09-2011, 04:50 PM
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    Re: 6mm Remington vs 6mm Ackley

    32 degree shoulder, longer neck, better throat life, Hydro die from Hornady to form brass instead of fireforming.....
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