Marlin 1895 45-70 26" barrel
300 grain JHP seated to 2.53" and crimped with a Lee Factory Crimp Die
Winchester brass, 2.1" trim
CCI 200 primer
58 grains IMR3031 START ≈2,020 fps ≈21,900 CUP
64 grains compressed IMR3031 MAXIMUM ≈2,250 fps ≈29,500 CUP
Marlin 1895 45-70 26" barrel
405 grain JSP seated to 2.55" and crimped with a Lee Factory Crimp Die
Winchester brass, 2.1" trim
CCI 200 primer
51 grains IMR3031 START ≈1,860 fps ≈26,900 CUP
55 grains compressed IMR3031 MAXIMUM ≈2,020 fps ≈37,300 CUP
Adapted from Hodgdon
As can be seen here your loads are rather mild, which certainly makes the Marlin 1895 more pleasant to shoot.