Re: 308 twist rate
if you got a 1-10 a 1-11.25 and a 1-12 all from the same barrel maker , chambered all with the same reamer by the same guy on the same action I'd be willing to bet a house note that the chances of one shooting better than the other because of the twist rate will be 0
The only time i evert seen bullets "spun" to fast was out of fast twist varmint gunns running bullets 4000+fps and the bullet came appart.
Personaly I like a 1-10 just to error on the side of caution if i ever wanna shoot a bigger bullet or shoot sub sonics