I shoot a 6mm-06 improved. Ill try to help if i can. I shoot 88gn Bergers with 58.5 VihtaVuori N165, CCI BR primer, and nosler 30-06 brass necked down. Krieger 28in barrel 3650fps.
I ran the #'s in Quickload to get the same psi in a 6-06 show's 56gn's of N165. I would start about 53 or 54 to see how it works. What powder do you have on hand and ill run it and see.
Remo