I plan to buy a new 7mm rem mag. I knew twist rate was important but I haven't ever heard if the was such thing as too fast. I was think of just going with a 1 in 8 twist with the new barrel. With this twist I should be able to shoot any bullet as long as long as its a quality bullet.
You can shoot anything in it, but IMO, it's a waste of a rifle to shoot anything less than a 168 in a 7mm RemMag. With that 1:8 twist, you can go all the way up to the new Berger 195 Elites.