What about a .375 Ruger? It does everything the old British number does, but with a more compact case. I believe that the Ruger will be around awhile unlike the Remington .375. It should work in an old .338 action too.

I have used one on a Kamchatka brown bear and it did very well. Its compact size was a benefit climbing up and down mountains with snow shoes on.

I have two H&H's, so I do like the old girl. But I believe the Ruger .375 is comparable, and reloading is a snap. Reloder 15 plus what ever bullet you have on hand.

Good Luck