Just checked my email and found a reply from CZ USA...

My question was about the 1 in 12 twist in the CZ 550 30-06 and its ability to handle 200+ grain bullets.

The reply was that they will be updated to 1 in 10 twist from now on, I guess I was not the first to ask... I hope they do the same with the 308 also.

Just passing it along, for those 200 and 220 nosler guys...