I had a 7 twist AR-15 that did "overstabilize" at least one shorter 50gr bullet.
Could have been a flaw in the bore but I did not see any. And I guess that lot of bullets could have been messed up somehow.
But I did experience the bullets rapidly disassembling themselves and spraying shrapnel on my targets.
With 12 and 9 twists, never had issues.
I would prefer the fastest twist I can get that is still practical for whatever I am doing, of course. I have two 9 twist 223s now and no complaints.
For a while the 9 twist seemed to dominate over the 12 twist. Now it's the 8 twist that seems to be dominating. I like the 8 twist myself but I have no heart burn with the 9. If it's a gun with a magazine like an AR, I could see where the 9 twist would shine with 62 grain bullets, maybe even some 69 grain bullets. The magazine limiting the length of the bullet and all.
If I were the king and I could make everything to fit in my world I would eliminate the 12 twist and the slowest twist would be a 10. I'm not the king and that's probably a good thing. For those guys shooting the light weight go fasters, the 12 and 14 is right up their alley. Who am I to judge ?? It's a good thing there are plenty of choices.
kwg
