From the Lyman Reloading Manual #45, the 7.62 Russian also known s the 7.62x 54R shooting 150gr Remington bullets out of a 24" barrel. Max loads listed and velocity. You can load down from there if you like.
IMR3031 powder max 46.0 grs= 2785'ps
IMR4895 powder max 48.0 grs= 2762'ps
IMR4064 powder max 49.0 grs= 2793'ps
IMR4320 powder max 51.0 grs=2849'ps
Accuracy load is 55.0 grs IMR4350= 2695'ps. It shows to be a compressed powder charge.
IMR3031 powder max 46.0 grs= 2785'ps
IMR4895 powder max 48.0 grs= 2762'ps
IMR4064 powder max 49.0 grs= 2793'ps
IMR4320 powder max 51.0 grs=2849'ps
Accuracy load is 55.0 grs IMR4350= 2695'ps. It shows to be a compressed powder charge.