I am new to hunting in Africa (one trip and another booked) I decided I wanted a .375 Cal Rifle, there will be a Buffalo on the list on our next hunt. Comparing the Ruger and H&H was a no contest to me, the .375 Ruger is the easy winner.
I'll eat the recoil difference many of you mention, 8 lb vs 10 lb rifle or whatever it is. I don't care! This is a rifle I am going to carry a LOT and not shoot much after I work up my loads. I'll take the lighter rifle. I never worry about or even feel recoil in the field.
I will have a can on my rifle, so I appreciate the lighter rifles and shorter barrel lengths that are common with the .375 Ruger vs the H&H. Recoil doesn't bother me, noise does. I very serious about not doing any further damage to my hearing. Most of the .375 Ruger rifles available come threaded.
The availability of ammo and components was something a lot of you mentioned. If you say so. I will never need to purchase ammo on a hunt. Components? Well I have Brass. Bullets, powders, primers all the same for both. I have a lifetime supply of components, not hard to gather on a rifle I will only shoot 30-50 times a year after I work up my loads.
The .375 Ruger is a more efficient cartridge, the difference is noticable when both are using the same barrel length. Balistics are generally close to identical when the .375 Ruger is exiting a barrel that is 2-3 inches shorter than you find on most .375 H&H rifles, which is the norm.
Ya I get the .375 H&H is a great classic cartridge! Its just funny to me that pages of you will say the lighter recoil is nice but not a single one mentions carrying around a rifle all day that is quite a bit lighter is also kind of nice.
The .375 Ruger is a really well designed cartridge. It does some things the H&H can't. But, there are several custom rifle makers out there building custom .375 Ruger rifles so you can get one custom made as heavy as you like and still get that classic feel while shooting modern cartridge.