.243 105gn A-max not stabilizing

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by remrifle333, Mar 28, 2011.

  1. remrifle333

    remrifle333 Member

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    I just bought a remington SPS .243 and mounted it in a Bell and Carlson A5. I worked up a load for the 87gn V-MAX and the 105gn A-max. With the 105 I had 39.7gn of h4350 and I was getting 2805 fps. It/I was shooting .75MOA at 100yds, 1.5 MOA at 200yds and 18" groups at 450 yds. With the 87gn I was shooting .5-.75 Moa at all distances. Has anyone else had a problem with the 105 stabilizing in their Remington. My twist rate is 1 in 9.125
     
  2. backwoods83

    backwoods83 Well-Known Member

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    The 105 amax has to long of a bearing surface to fully stabilize in a 1:9 1/8 twist especially at that MV, they should be put through 1:8 twist at 2850-2950fps, try the 95grn vld or 90grn lapua at over 3k fps.
     

  3. remrifle333

    remrifle333 Member

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    I will get some of those 95gn bullets and try them. I wanted a couple of bullets for this gun. A lighter bullet for varmits and a heavier one for longer range applications.
     
  4. ZSteinle

    ZSteinle Well-Known Member

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    they work in my sps. 42gr. h4350. Im also shooting at 4500ft. above sea level though.
     
  5. backwoods83

    backwoods83 Well-Known Member

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    Yeah they will stabilize at that altitude, and your running them probably about 2930ish I'm guessing?
     
  6. matt_3479

    matt_3479 Well-Known Member

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    I bought the SPS Varmint and my neighbor had some laying around so i hired a few and it was about .75 moa at 100 yards, .5 moa at 200 yards which i found weird and past that it was all over the place. i really wanted to fire the 105 grain for coyote, long range, and whitetail. but looks like i may have to drop down to 95 grain.
     
  7. ZSteinle

    ZSteinle Well-Known Member

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    3020fps
     
  8. remrifle333

    remrifle333 Member

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    I was shooting at 202 ft in some river bottoms and it was 41 degrees.
     
  9. ZSteinle

    ZSteinle Well-Known Member

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    as long as your not showing pressure signs, bump up the speed. i am using lapua brass now but with my win brass i wasnt showing pressure till 41. Id start with more powder and i bet they will start to stabilize.
     
  10. lamiglas

    lamiglas Well-Known Member

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    I have a rem 600 mohawk and I could not get the 105 amax to shoot either. I have the same twist rate and the magic load for my rifle is 41.5 of h4350 with the 95 hunting berger vldgun)gun)