Flatlander,
I was sort of kidding with you there. I think you meant to say that the barrel has a 1 in 9 twist rate. A 9 in 1 twist rate would have the rifling doing 9 twists every inch. Everyone knows what you meant though, so I figured I have a little fun with it.
The bottom line is that it is a nice rifle and the 1 in 9 twist will indeed shoot heavier bullets. My Rem with a 1 in 9 twist rate will shoot 75 grain Hornady A-Max bullets very well, and it will shoot all the 65, 68, 69, and 70 grain bullets by Sierra, Berger, and Nosler, extremely well. And what's really nice is that it should also shoot the really light bullets well. I haven't tried any yet, but I have a box of 55 grain Sierra HPBTs that will get loaded up in the future.
Please let us know how the 45 grainers work in your rifle. Hey, that baby is a Savage, I'll bet it shoots everything well.