dogbustin,
The STW has been one of my cartridge enthusiasms since it was introduced. I have shot whitetail, muledeer, antelope, elk, moose and caribou with it. I'm on my fourth barrel.
The Featherweight would be a poor choice to build one on, as much as I like them. The cartridge really needs a 26" pipe. The Featherweight stock doesn't look right with one. I don't think that Winchester chambers the cartridge anymore, but you should be able to find a new one in the system. I saw a listing just the other day. I believe that Sako still chambers the 75 in STW, my buddy's shoots great but weighs about a pound more than it needs to. Ruger puts it in the #1 too. With Model 70s I have used the magnum length action, plus the regular long action with the bolt stop shortened and mag spacer removed. Both work, but the magnum set-up is a bit better. My current one was a factory chambered rifle, it is now wearing a 26" Gaillard barrel, .312 neck chamber, blueprinted action, Tubb speed lock and Jewell trigger. Current scope is a 3.5-10 VX111 with a 4.5-14 LR with B&C in the mail.
Recoil is similar to the .300 Win mag, stiff but not really that bad.
I don't know what kind of country you hunt in, but you can basically forget about holdover to close to 400 yards on a deer sized target. That will take care of most anything that needs doing.
Dogleg