I don't think the 358 has been made in the Classic Featherweight. It was, however, made in an earlier version of that rifle. The cartridge itself is a fine little package and thoroughly capable of great deeds. I've not killed any whitetails with mine (a rebarreled Model Seven) but I have killed a few moose and caribou as well as at least one brownie with mine.

Sometimes, the air you 'let in'matters less than the air you 'let out'.