.243win barrel twist info.

MXoutdoors

MXoutdoors

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I am looking to buy or build a long range rifle in .243win and need some help on barrel twist info.
I'm looking to run DTAC 115gr or Hornady A-MAX 105gr bullets and would like to know if Remingtons 1:9.125" twist on there SPS-V will work with these bullets or should I go with somthing like a 1:7" or 1:8"

Thanks for any info.
Ron
 
Kazimer,

my remington 7600 with 1:9.125 stabilizes the 105 grain Amax bullets that you sold me. Thank you very much by the way. :)

32 grains of varget and the pump gives me regular 0.75", 5 shot groups @ 100 yards. They are still stable at 300 yards but I'm not as accurate.
 
Warren,

You know that this was not the case with my Rem 700 VLS otherwise I wouldn't sell those bullets.

Recently I bought a book by Bryan Litz "Applied Ballistics For Long Range Shooting". The book explains principles of bullet stability and how to do the calculations. Before I answered MXoutdoors post I did those calculations for those two particular bullets and 1:9.125" and 1:8" twists. There was a negative result for the 1:9.125" twist.
For the calculations I was using The Miller Stability Formula.

:cheers: Kazimier
 
Sorry, I was not trying to be a smart arse. I know you told me they did not stabilise in your gun. They do however, stabilise in my pump rifle ( though its hardly a precision rifle). I am just pointing out that the 1:9 twist can work. But you are right, if you want to shoot the heavier bullets then going for 1:8 would be better.
 
The 243 is a stout fast round.

for 115 grain bullets, the 1:8 does work. I have made them work in a 6X47 Lapua with a 1:8. For 105's a 1:9 Amax and even a 1:10 would work.
 
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