Hello Ash,

congratulations to your "new" rifle!

I dislike the case stretching and the often necessary shortening process in the .375 H&H.

I have two .375 Weatherbies (Heym and Brno), made of the basic .375 H&H rifle caliber, and I think the improved version is better!
You can use the standard .375 H&H ammunition with only a small shifting in point of impact and have additional power on request.

So if you avoid full length sizing your cases (which will give the headspace problems) you have a winner in your gun rack!

best regards
Rolf

PS: I use the Sierra 250grs SPBT for forming cases and obtained good precision with formed cases with the Barnes 270grs TSX at about 2720 fps.