Both the Ruger and the H&H have the same 1-12" rate of rifling twist.
I have used the Woodliegh 350's in a H&H, WBY and small Steyr. From 2200 to 2350fps. Where they shine (if anywhere) is in the 378 at 2700fps.
I "think" the 350/.375's out penetrate the .40cal's, but then again I have not been much of a .40 caliber fan, deciding that the .375 is a fine hunter's choice and if I am looking for a fight I will start with a 458Lott and go up from there as terrain would dictate.