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Thread: Sako 85 .243 100gr loads

  1. #1

    Sako 85 .243 100gr loads

    I've just bought a Sako 85 Synthetic Stainless in .243 and looking for any help from the forum who use this rifle with loading data for 100 grain BTSP
    Many thanks in advance.

  2. #2
    What barrel length and twist rate ?
    For 100gr you need a 1:8 twist.

  3. #3
    Quote Originally Posted by deerpath View Post
    What barrel length and twist rate ?
    For 100gr you need a 1:8 twist.
    Since when? I shot 100g through my Sako 75 .243 and I'm pretty sure it was a 1 in 10 twist.

  4. #4
    1 in 8 will sort out most 243 bullets, 1 in 10 might just be ok. My 1 in 10 Sako is temperamental with 100g bullets and will only shoot short, flat-based bullets. It loves the 100g Sako Gameheads; it was in for some work recently & I asked the gunsmith (who also works up loads for people) to try & find a really good 100g bullet for me & he couldn't better the the accuracy of the Sako's (factory loads).
    Last edited by McKenzie; 14-10-2015 at 12:07.

  5. #5
    I posted this to the thread about 100-gr bullets in the .243.

    -----------------------
    The .243 Winchester and 6mm Remington (6x57mm) have come in a mix of rifling twist rates.

    The Model 70 was 1:10, so most .243s are the same. The .244 Remington's were 1:12,and shot 75 and 85-gr bullets very well, but the Model 700 was changed to 1:10, then when the .244 Remington became the 6mm Remington, all Remingtons were change to 1:9 ( M700, M660, M788). When Remington started offering rifles in .243 ( which was far and away leading sales ), they made them 9 1/8" twist. Savage went with 1:9.25 in its .243s.

    The Browning B78s were offered in 6mm Remington, with a 1:9 twist rate. I had one, and it shot everything into cloverleafs or bug holes. It has a longer barrel than most .243s or 6x57s, so it is steaming the bullets out faster than most. Stabilizing flat based 105-gr bullets or boattail 100-gr bullets was no problem for it, whereas a .243 Win with a 1:10 or 1:12 twist and a short barrel cannot muster the muzzle velocity necessary to impart the RPMs necessary to stabilize heavier bullets.

  6. #6
    Quote Originally Posted by McKenzie View Post
    1 in 8 will sort out most 243 bullets, 1 in 10 might just be ok. My 1 in 10 Sako is temperamental with 100g bullets and will only shoot short, flat-based bullets. It loves the 100g Sako Gameheads; it was in for some work recently & I asked the gunsmith (who also works up loads for people) to try & find a really good 100g bullet for me & he couldn't better the the accuracy of the Sako's.

    I have found this to be true of a number of Sako barrels in a variety of calibres now

    100gr in most 1:10" barrels is usually fine but may be matched to a sweet MV or bullet style
    I personally found flat base interlocks in both SP and RN format were very accurate from two different Parker Hales

    Not pushed to the limit but two clear accuracy points
    I chose the slower of the two as I was only shooting Roe in Scotland with it

  7. #7
    According to the RFD and the Sako user guide it has a 10" rate of twist on a 20" barrel.
    I am having little satisfaction using factory loads in 100gr but require this weight for Reds in Scotland.

  8. #8
    As many .243 Win owners as there are on this forum, it would be interesting to hear from those who use a Remington M-700 or Model 7 with 20-inch barrels of 1:9 rifling. A lot of people I know use the Model 7 with 100-gr Core Lokt ammunition and swear by the accuracy and lethality on deer.

  9. #9
    Thanks Southern, I've worked up a load to 39.0 gr of IMR4350 in Lapua brass and started to get respectable groups with 100 gr BTSP. Might try 95 gr. when I get back to see if they suit the barrel bettr.

  10. #10
    Is the 85 significantly diferent to the Sako 75?

    I am shooting 100g Federal Power Shock soft points and have no problems at all

    Click image for larger version. 

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