170 is an oddball weight for 35 cal projectiles. There is not a lot of test data with pressure in psi for the 170 to 180 range for boolits.
As noted seating depth will matter.
It was noted that there is also no info posted on the gun, the application or the desired powders to be used.
I recommend the OP use a dummy round and/or the mold to estimate bullet length and seating depth and post the values in this thread. Also he should post the "as cast" boolit weight.
Figuring out seating depth is easy for the mold/bullet you have but it can be a challenge to determine seating depth for tested loads. We can usually help with the last piece.
The OP should also provide some info on guns and some info on desire usage. Providing a list of powders on hand (or willing to get) is also a plus.