.243 105gn A-max not stabilizing

[remrifle333]

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

 

[backwoods83]

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.

 

[remrifle333]

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.

 

[ZSteinle]

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

 

[backwoods83]

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

 

[matt_3479]

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.

 

[ZSteinle]

3020fps

 

[remrifle333]

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

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

 

[ZSteinle]

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.

 

[lamiglas]

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)