I just spent a whole lot of time scrutinizing every detail between the 358, the 35 Whelen, the 338 Federal and 338-06, as I was also looking at rebarreling a gun or getting a new one... between the options you listed, I’d go for the 338-06. A good blend of power and trajectory. It seems like the short action medium bores are a bit anemic, barely outdoing the 308 Win past 300 yards or so. They do seem like they wood be fantastic black bear guns in the woods though, and if your area of PA is similar to what I hunt in WV and NC, any of those rounds would be great. Which would you see your self using more, the 338-06 or the 358?