I don't think you will find a Savage .22-250 barrel in that fast of a twist. Think the fastest OEM is 1:9? 90gr is a huge bullet for .22-250 and will take a 6.5-7 twist. If you find a Savage 9 twist for sale you can shoot ~75gr while not slowing down the lighter pills that much.

And I assume you are going to handload cause you won't find many heavy commercial rounds. Personally, I have a 12 twist .22-250 and have been looking for a Savage stock 9 twist to replace it with. Then I will load the same heavy rounds I use in my .223....