Does anyone have any load data for the .375 Weatherby Magnum? Looking to start reloading for it and having trouble finding any information.

Lawdog

My favorite:
Winchester brass fire formed.
F215 primer
88.0 grains of IMR-4350
Any 300 grain bullet you want
24" velocity 2700 fps

Or use 90 grains of the same powder and any 270 grain bullet for 2900 fps, same brass and primer.

Straight from volume 1 of the Handbook for Shooters & Reloaders by P.O. Achley:

pg 486

235gr. bullet 82gr. 4064powder 2950fps
84gr. 4064 3015
86gr. 4064 3060
270 80gr. 4064 2795
81gr. 4064 2825
300 78gr. 4064 2630
80gr. 4064 2680
72gr. 4350 2265
75gr. 4350 2310
77 4350 2385
80 4350 2490
82 4350 2530
84 4350 2630
85 4350 2655
86gr. 4350 2675
87 4350 2730
88 4350 2740

Hope these help
Good luck

There are different dimensions on this cartridge. Check which you have by a chamber cast. For example see Barnes and A-Squares manuals.

Also make sure you have the Wby freebore. It makes a big differance in the loads you can use. - Dan

Thanks everyone for your reply's. Hope everyone has a Safe and Happy New Year. Lawdog

My 375Wby is a custom gun and does not have the typical Weatherby freebore, and yet it delivers 2700+fps with safe pressures. Start at max 375H&H loads and work up carefully from there and you should not have any problems. I'd suggest R19, H4350 and IMr4831 in that order as good powders to start testing.