[pilgrim,
I'm not going to advise you which load to use, since I know nothing about your rifle, but I use 46.5 gr H 4895(mil."pull down")behind a 196 gr bullet.I arrived at this load many years ago before I had a chronograph and when I got one the velocity was in the 8x60 area, so I suspect it would also work with 170 gr bullet. When I run out of these bullets(Norma), I will work up a milder load.
Mike