IMR4350 would probably work. I've always used H4831 with bullets in the 160-grain class, partly because I got my rifle in a trade with Steelhead, and that's what he'd been using. It worked not only with the 160 Hornady, but the 156 Norma Oryx, but it gets over 100 fps more with the Oryx.
Tried Varget and Norma MRP (which is essentially Reloder 22) with 160's. and neither shot as well as H4831.
Would also agree with Steelhead that there are better bullets than the 160 Hornady. Have seen it break both a deer's shoulders and exit, and also fail to reach the far ribs on a behind-the-shoulder lung shot. Phil Shoemaker has also had similar experiences. The Oryx is bonded, which solves the problem.
