HI TO EVERONE OUT THERE ...
I AM RATHER A NEWBIE IN THIS RELOADING MATTER AND LOOKING FOR ADVICE ...
FIRST EXPERIENCES WILL BE "GAINED" RELOADING A .375 H&H, REMINGTON MODEL 700 MOUNTAIN KS RIFLE (CUSTOM SHOP)GOT A LOT OF SIERRA BTGK 300 GR, SO MY FIRST LOADINGS WILL BE USING THESE BULLETS, AT A FIRST STAGE AS PRACTICE AND THEN HUNTING AMMO ...

ANY SUGGESTION ABOUT POWDER AND CHARGES WILL BE REALLY APRECIATED !!!

Bullet:Sierra 300 Grain Spitzer Boat Tail
Powder:78.7 grains of IMR-4350
Primer:Remington 9-1/2M
Case:Winchester
Firearm:Ruger
Velocity:2596 FPS @ 15' from muzzle
Accuracy: 3-shot, 1" groups at 100 yards

76 gr H-414, 300 grain anyhting, Winchester brass, Fed 215 primers. 3 shot groups out of a Model 70 ( sorry 3/8" really! jorge

Look to try RL15, Varget, W760, H414, and 4350's with 300 gr. loads in your 375. W760 or any of the 4350's would be where I'd begin. W760 if you use a powder dispenser (flows through better because it is a ball powder), or 4350 if I was hand measuring charges.