Mugsie: 75 gr 22 caliber bullets were designed to shoot and stabilize in the faster twist barrels from 1/7 to your 1/9 barrel. You should get fine accuracy from your Savage in the 1/9 barrel. From experience you would get very poor accuracy with the heavier bullets in a slower twist like a 1/12 which were designed for the 55 gr bullet. Your selection of powders are good ones, and if you have the chance, try Hodgdon's Varget also. Your bullet weight shoots excellently in my AR15 with a 1/7 barrel btw.