Anybody have any experience loading for a Win 94 Big Bore in 375? Just got one earlier this year, and am going to start loading for it this winter. Already have 4895, 4350, and 3031 powder for other loads, and would like to not buy a new powder, but if someone has something good, I could. Just hate having too many different powders sitting around.
When I got the gun, I got several hundred Hornady 220Gr bullets with it.

Source: "Hornady Handbook of Cartridge Reloading"Fifth Edition
Cartridge: .375 Winchester
Case:Winchester
Primer: Winchester WLR
Bullet: Hornady 220 gr. FP
Powder: IMR 3031 MIN: 34.0 grs. VEL: 1800 f/s;MAX:35.2 grs. VEL: 1900 f/s

(NOTE) START AT MIN.

Good luck.

4350 is a bit slow in the .375 Win. In fact, it is a little TOO SLOW for ANY straight-walled cartridge, like the .32/40, .375 Win., .38/55, .45/70, etc.

Of the powders you already have, H4895is probably the best, and I doubt that ANY OTHER POWDER would be as good-exceptRE 7 and IMR 3031 in that order.

According to my Lyman manual, a MAX load with RE 7 is 38 grains with that Hornady 220-grain bullet, and that gives 2259 FPS. The book also says that 38 grains of H4895 isaMAX loadfor a MV of 2069 FPS.
For IMR 3031, 35 grains is MAX, and it gives 1938 FPS, all with the Hornady 220-grain bullet.....

You can get up to1985 FPSwith a charge of 35 grains of IMR 3031, same bullet-ALSO A MAX. LOAD. To start with, I would start at least 5% below theselisted MAX charges.....

my first choice would be H4189 ,cant say how much to use ,look in the book