That seems like a pretty stiff powder charge for a cast bullet. I use 20 gr of SR4759 with the 195 gr Saeco #301 gas check bullet. My Krag may slug at .309, but the chamber throat is worn and is .315 across in one direction. I seat my gas checks and apply lube using a .314 sizing die. I believe the bullets drop from the mold at about .312

I think I'm using 42 gr of 4895 for a mild load in the M1 Garand, basically just enough to function the rifle. Your 35 gr isn't that far off what I'm using in the 06.

I believe 3031 will load down well. You can't go wrong with a light charge of Unique.

I don't have a lot of cast bullet experience in rifles, but I would start with loads less than 1600 fps.