I am lookin this same thing up for a friend . In my Lyman manual it lists for the 125 gr bullet (Rem load 125 gr bullet at 2660 fps) in Win. case & Win. LR primer
RX7 38.5 gr 2700 fps 38500 CUP - 43.0 gr
IMR-3031 45.0 gr 2730 fps 33000 CUP - 50.0
748 51.5 gr 2890 fps 35300 CUP - 58.0
H-335 45.3 gr 2800 fps 37400 CUP - 51.5
BL-C(2) 49.0 gr 2890 fps 35000 CUP - 54.0
IMR-4064 48.0 gr 2760 fps 31500 CUP - 55.0
IMR-4895 47.8 gr 2815 fps 36500 CUP - 53.5
IMR-4320 49.0 gr 2770 fps 36000 CUP - 55.0
H-380 51.0 gr 2967 fps 39000 CUP - 56.5
760 56.3 gr 2800 fps 34200 CUP - 63.0
IMR-4350 55.0 gr 2750 fps 34000 CUP - 61.0
H-450 56.8 gr 2670 fps 34300 CUP - 64.5
H-4831 55.0 gr 2550 fps 30000 CUP - 61.5

I have some 3031 so we are going to try the lowest load for his son.
The litest loads should not be reduced .
Hope this data helps you .
I am not used to trying to get slow loads !