I shoot a “light magnum” load with Win244 that sounds an awful lot like what you are aiming for. It is with coated SWC’s though.
158gr Summit SWC
6gr Win244, 1.61” COAL, SPP
17.4” Henry: 1300fps
4” Trooper MkIII: 1030fps
3.5” Pre-27: 985fps
2.5” 66-7: 975fps
2” Magnum Carry: 953fps
With jacketed and 231/HP-38, Hodgdon is showing 6.2 grains as a minimum at 1100 fps from a 10” barrel. At 25fps per inch, you’d be looking at about 950fps from a 4 inch. I’d start at minimum and see how you like it.
158gr Summit SWC
6gr Win244, 1.61” COAL, SPP
17.4” Henry: 1300fps
4” Trooper MkIII: 1030fps
3.5” Pre-27: 985fps
2.5” 66-7: 975fps
2” Magnum Carry: 953fps
With jacketed and 231/HP-38, Hodgdon is showing 6.2 grains as a minimum at 1100 fps from a 10” barrel. At 25fps per inch, you’d be looking at about 950fps from a 4 inch. I’d start at minimum and see how you like it.