I've got a 358 WSSM, which approximates the 358 Win with a 200 grain Hornaday SP. I'd go with a minimum #3 contour barrel, which will be hard to fit in a featherweight stock without a lot of barrel channel hogging. We've used the 25 WSSM featherweight rifles for donors and had to hog out several barrel channels. JMO, YMMV...

“There are some who can live without wild things and some who cannot.”
ALDO LEOPOLD