Not a lot of factory rifles in 35W but it’s not hard to find one if you want one. As previously mentioned, Remington made the 700 Classic in 35W and you can still find them for sale. Ruger chambered the 77 in 35W and you can order the 35W in a Nosler 48, Cooper and the Montana Rifle Company made them in 35W (I think they’re not in business any more?).
I just checked Online auctions and found 5 Whelen’s for sale. (1 Remington, 1 Ruger, 1 made on an 03-A3 action and 2 made on Mauser actions.
My Whelen is based on an FN Mauser action and it’s fun to shoot. Had it out yesterday trying some 225 grain Sierras. Recoil is very manageable.
I live in the center of the USA and our big game here is primarily deer. We don’t have to travel too far to hunt elk.
For my location the Whelen is more practical to own than the 9.3x62. You can usually find a box or two of Remington core lock 35W in our local shops and 30-06 brass is plentiful to make your own. I reload for my Whelen and primarily use the Hornady 250 grain Spire Point.
I’ve thought about why the Whelen isn’t more popular and it’s obvious, at least to me, that there are several reasons. There are not many factory rifles chambered for it, it’s not mainstream commonly mentioned rifle in hunting magazines, you don’t really need a 250 grain bullet to kill a deer and there are powerful calibers that have more reach for larger game like elk.
I mainly use mine for hog hunting. . The heavy slow bullets easily defeat the gristle plate for quick clean kills. I own it, not that I really need it (hope my wife doesn’t read this) but I enjoy owning something a little different and like the history of the cartridge that gave American hunters “big” bore capability using commonly available actions and components.
I have no experience with the 9.3x62 but I have no doubt that it is a fine cartridge with an interesting history but the 35 Whelen just works better for my situation and I really doubt that game shot with a properly placed shot from either caliber will be able to tell the difference.