So I guess the short answer is nothing because you can get any twist you want when you order a barrel. I personally shoot the Berger 105 veld in my target gun with an 8 twist. I do have a few 108 that I will give a try. Not sure if a 6br will push them hard enough though. Thanks for the Hint. Ed k
Funny that a thread about factory ammo with 108's brings you to this conclusion.
