R-11 is the powder that is used for Fac. Dup. velocities in most of my manuals.

With the 170fr Jsp I did find 4895 and R-7 data and for your
load you might try a medium of the road load, since I do not know the condition of your rifle. The 170 fps was listed at 2223 in my Speer manual.

Start at;
4895..........32 grains
R-7 ......... 24 grains
with that 165gr bullet and work up.

PS;
Hornady has that bullet at 2400fps with a BC of .330 but companies are usually a little high on fps
so here is what you will get at 2200 fps.
With a 100 yard zero at 200 yards the bullet will drop 7.6 inches and have 1,112 ft/lbs of energy......
plenty for deer size animals with good shot placement.

Gieday,Mate.