twist rate versus performance

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bearhunter

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Ok, I understand how the length of bullets effects accuracy performance with bullets.

I have a supply of 55 grain bullets for my 1-10 twist 223 Rem. I also have a box of 60 grain flat base. Both shoot well out of my rifles.

My question for those of you that have experimented with the 223 Rem with twist rates in the 1-10 range is how heavy can the boat tail bullets be before they lose stability? Same goes for flat base bullets.

I'm guessing around 62 grain boat tails and 70 grain flat base.

Has anyone been able to stabilize anything heavier with a similar twist rate??
 
I can stabilize the 60 FB HP in a 1:14, so i am sure your 1:10 can go much heavier. The 69gr match, for sure and maybe the 75 gr HP.

The 1:10 WILL NOT stabilize the Sierra 80 gr Match. maybe the 75 HP.
 
AR's with a 1:9 twist will shoot 75gr Hornady BTHP's ok from what I can tell. Your 1:10 with a longer barrel (assuming it has a longer barrel) should be close to that as well. I can't see anything heavier than 75gr working for you.


Mark
 
it is the length of bullet that determines their twist requirement, not their weight, Shorter blunter bullets will stabilize better than longer ones for a given weight.
 
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