Re: 375-416 ruger
As far as Ruger 375 vs 416 I thing think the 375 is a more versatile choice.
The 375R has slightly greater capacity than the H&H so it easily matches the ballistic of one of the greatest cartridges of all time....What more can you ask?
The 416 has somewhat less case capacity than the 416Remington...Which I think is a mistake given the very long 400grain bullets it is intended to shoot...Especially if you plan on going to Africa.
Finally there is the recoil of the 416...while most shooters manage the 375 fairly easily most never learn to master a 416. The 416s require muscle tension (push pull)to hold them under recoil which further complicates field accuracy issues. How about shooting a 416 prone?...You better do it right!
All of this can be managed, but this is a learned process that is only learned be sending a great deal of very expensive ammunition down range (price out a box of 400 grain TSX!)...Most will not do it.
So I don't recommend it.
I would not build a 375 Ruger on a Savage action.
For less money you could sell the Savage and buy the real deal and it will function as a DGR should. The Ruger is a great bargain for the money.
Some of the earlier rifles had some reported feeding issues. Today it seems the new rifles feed very well. My buds feeds perfectly.
Whatever you do put the rife in a stock designed to work with higher recoil levels (straighter/less drop and a more open grip). Rifle fit is key, but at higher recoil levels and where dangerous game is concerned it is essential to get back on target as quickly and as smoothly as possible.
McMillan is your friend.
Peace