After reading this thread, I would add the following. I had a friend whho re-barreled a Sako Fiberclass to .416 and it was light; I shot it from the bench and the recoil was noticable. I have seen and handled a factory Sako in .416 Rem. at a store in Vancouver, B.C. they have also had one of the new Safari Deluxe Sakos, I examined it and it was overpriced for what you get.
I have also seen and handled a Brno 602 that was re-barreled to .416 from .375, not a wise idea unless the 'smith really understands crf rifles.
I have now owned six .375H&H rifles and used them for work in wilderness areas of B.C. while working alone in Grizzly country. These were a Brno 602, a Ruger MKII Magnum, a Browning FN-LE Safari grade and three P-64 Mod. 70s. Of all of them, the Ruger was an ill-balanced club, the Brno was poorly finished and not well balanced, the Browning shot superbly, functioned well and kicked like a drunken Mule while the old Mod. 70s performed best.
I know people who have had pushfeed rifles "doubleclutch" when being bluffcharged by a Grizzly and one of these was a Sako; these guys are very experienced, professional bushmen in B.C. I had a Ruger pushfeed do the same thing when suddenly confronted by a Grizzly at about 20 yds, in Oct. '79 at Whiteswan Lake in B.C.
For a serious .375 H&H rifle, I would pick a Dakota 76, a P-64 Mod. 70 or an older Mod. 70 Classic over anything else available. I currently own a very nice factory P-64 and two factory H&H modified P-64 actions and prefer these to anything else. The Dakota is also very nice and works very well, mine is a .338Win. Classic, but, I would get the Safari model for Grizzly work.
I base these comments on many years working for the B.C.Forest Service, the Alberta Forest Service and various private consulting firms engaged in technical forestry work. this commenced in 1965 and I have spent months on end, solo, living in the most densely populated Grizzly areas of western Canada. I will NOT use a pushfeed rifle in Grizzley country because I want the advantage of the slightly more reliable crf design.