A good friend has a couple of the Rugers, in 375 and 416 Rigby.
I got the chance to help him burn up some ammo on both rifles.
I have to say the 375 H&H was pleasant to shoot, probably because it was so heavy. My friend was feeling like burning up some expensive ammo that day, so I got to put about 20 rounds through it, and I think because of the weight, it was real nice shooting that 375.
The 416 Rigby was not so nice to shoot. Think it loosened up my teeth and only 3 rounds was enough for me.