Okay, The 280 Ackley is back from the Shilen plant and is shooting great. Now on to the next project. I am going to rebarrel my Savage 110 action from it's factory 243 Ackley barrel to a Hart barrel. I've decided to stay with the 243 AI. I want to go with the stainless steel Regular HV contour @ 26" long. I will be shooting bullets from 65 to 100 grains but 99% of the time will be 65 to 75 grains for varmint hunting. Which twist rate do you think I should go with? The factory barrel is 1-10 and seems to favor 75 gr bullets. I could never get it to shoot well with heavier bullets. At any rate, which twist? Thanks