If I were buying a new rifle in 375 Caliber I'd find one in .375 H&H. I like the Ruger case not so much for the rifles it is chambered for but for the rifles I CAN chamber for it. Truth is, any rifle chambered for a short magnum can be readily converted to the new Ruger cartridges.
Only thing about most H&H chambered rifles is that they are too heavy as supplied. The .375 Ruger was introduced in a lighter more compact package which I applaud. However, I just didn't care for the rifle that much.
The first .375 Ruger I built was built on an H&R which used a Zastava action (Mk X). It was a 7mm Rem Mag but did require alteration of the feed rails due to the wider shoulder to feed properly.
