hello.
First off, the savage 12 is a 12" twist standard and the 9 is a special order item. If it is a 12 twist the highest bc you'll stabalize is the 55 gr Blitzking. Berger's website will give you a good idea of what twist is necessary for various bullets. you may want to take a cleaning rod and a tight patch to see how far you have to pull the rod out before it makes one revolution.
good luck