Just getting my first long range rig I really want to start with a factory rifle. I settled on the CZ 550 varmint in 308. The barrel twist rate is 1 in 12, the standard seems to be more like 1 in 10. I will be shooting factory ammo probably 168 or 178. Is there any disadvantages to the faster twist rate. This will be a deer rifle for out to 500-600 yards.