I've used several brands of ammunition in my Sako 85 (1:12 twist) but home loads have proved to be considerably more accurate at 300-400 yards. The brass seems to live forever, and I get good results with 52gr SMK or 52gr A-Max (but you cannot get these any more) and 23.5 - 23.8gr N133.
It is also OK with lighter (40gr V-Max) but didn't like the 69gr projectiles, which I believe are better-suited (as others have said above) to a faster twist.
Definitely worth giving it a go!