Random 8
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I'm away from my notes, but have had great success with IMR 4064 and 150 grain bullets at or below 300 Savage velocities. My standard M1 load is with 47 gr of this powder, but in testing I went as low as 44 and the accuracy held up well, but I increased charge for positive function in the M1. This load is also extensively tested for extreme cold. Recoil with 150s is mild even at the 47 grain level. I would go this route with a cup and core 150 at or slightly below book start loads and see if accuracy and recoil match your needs. Both the Hornady and Speer 150sp are deer hammers down to 2000 fish, probably lower. You could work in a similar range with your 170s, but you're adding some unnecessary recoil with the heavier bullet.