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Thread: .243 A-max 105gr from 1:10 twist any good?

  1. #1

    .243 A-max 105gr from 1:10 twist any good?

    I want to try the A-max .243, it is only available in 105gr and is quite a long bullet. My Sako 75 has 1:10 twist rate and 20" barrel. Will this struggle to stabilise the bullet. Has anyone used this bullet in .243 in 1:10 twist.

    Any help much appreciated George

  2. #2
    Quote Originally Posted by liongeorge View Post
    I want to try the A-max .243, it is only available in 105gr and is quite a long bullet. My Sako 75 has 1:10 twist rate and 20" barrel. Will this struggle to stabilise the bullet. Has anyone used this bullet in .243 in 1:10 twist.

    Any help much appreciated George
    George.

    I had the same rifle. I wish I had kept a copy of the target with the 105 A-Max going sideways through it.

    Best regards

    JCS

  3. #3
    A rifle-smith tested the 105 A-Max in my Sako 75 & got groups of over a foot with many of them hitting sideways.

    The most accurate round I've found for this rifle is the Sako 100 Gamehead.

    If you really want to go to 105 then I found the Geko ones to work reasonably well with groups of about 1", as opposed to about 1/2" with the Sako's. I'll keep the Geko's for big deer. The POI at 110yards between the 2 rounds was different by about 5" which I was quite surprised at.

    Edit: Mine has the 22 1/2" barrel.
    Last edited by McKenzie; 09-03-2016 at 08:14.

  4. #4

  5. #5
    Search the recent threads on this. You cannot get enough MV in that short barrel from a .243 to stabilize 105-gr, especially long bullets. A 6mm Remington with 9.25 twist rifling and a longer barrel will do it very well.

  6. #6
    Couldn't get them to go straight in my .243 even driving them too fast didn't help.
    A flat base 100gn SP from Taipan worked beautifully (sub 1") but I can't get them anymore.

  7. #7
    realistically you'll need a 1-8 twist to stabilise them, they're a really long bullet

  8. #8
    The best advice you can get is to use a bullet that is designed to be stabilised in the barrel you have. Pushing the envelope just for the sake of it is frustrating and ultimately pointless . Expensive too.
    I tried the Amax using 10 'borrowed' bullets from a friend but at the same time made the mistake of buying some very expensive VLDs discovering of course that they went sideways at 50m. That was in a 1:10" 26" 6mm BR being driven hard.
    Horses for courses I say.
    Last edited by hybridfiat; 09-03-2016 at 14:20. Reason: Pore speling

  9. #9
    I've had excellent results with 85gn tsx solid copper bullets, both accuracy and terminal performance

  10. #10
    i have a 23 year old sako m591 in .243 win 20 inch barrel with geko 105 on the bench zero at 1" high at 100 if i do my bit well can get 3 round groups at half inch dead centre bull at 200 using led sled what i find amazing with is that i find very little change in poi using sako 90 grain sp this old sako is deadly accurate at the moment i am using some home loads made for me by a mate who is a target man seairra bliztkrieg 70 gr ballistic tips just about bullet on bullet using bipod and bag cracking old rifle
    Last edited by Hussar; 09-03-2016 at 15:19.

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