I just returned from the range and have finally settled on my final 375 H&H loading for Zambia. The rifle is a Winchester Mdl 70 Safari Express which has been glass bedded and had both the action and trigger worked. It will be my light rifle for this trip, paired with a Ruger Safari Magnum in 416 Rigby.

The 375 H&H load is:

68 Gr IMR 4064, Federal 215 Large Rifle Primers and Barnes 300 Gr TSX bullets for a velocity average of 2575.

In my rifle, this combination produces a single ragged hole at 100 yards.

IIRC, 68 gr of IMR 4064 is the ol' Jack O'Connor standard for 300 gr bullets in the .375 H&H. I use it (with a WLR primer) with the 300 gr Hornady RN for about 2480 fps in my Ruger M77 Magnum. Very accurate load in my rifle.

-Bob F.

I'm using 67.5 grains of IMR4064 with the 300 grain TSX in my 375H&H and it gets me 2480 fps at 10 feet from the muzzle.

And one ragged hole.

Looks like I'm in good company!

This is an old classic load for the .375. It is a classic for a reason, but then again, there wasn't any RL15 available then.

Funny you should mention RL15. I tried it and had less than desirable results.

I've had very good results with RE`15 and Barnes X 270's, about 74 grains, also with Hornady 270 spires and RNs. But I've liked IMR 4320 with 300's and Sierra 250 Bt. 67 in the 300 and about 70-71 with the 250s. Very accurate.