The range of opinions on recoil of a 1B in .375 H&H should give a warning to the OP as to whether or not it's the cartridge/rifle combination he's looking for; I have a feeling he may not be that experienced with rifles or with game animals.

FWIW, I've had three .375's: A Brno/CZ 602, a custom-stocked #1, and a SAKO AV Mannlicher. The #1 was the most uncomfortable to shoot with the full range of .375 loads, but still bearable. The SAKO is the lightest of the three, but also the most comfortable to shoot as well as the most accurate... and it's the one I still have.