If the 358 win is good, the 338 fed should be even better with a wide selection of bullets and good SD. 35s have never really taken off in the US, with the exception of the 35 rem - still limited, but the 338 win mag has a solid following. there have been many successes with the 308 case so I can see no reason why the 338 fed will not do ok. most folks dont need a 338 and especially a 338 win mag but I can see the virtues of a 338 bullet, say a 210 partition, launched from a light and handy bolt action rifle as dandy close cover deer rifle. the reason I sold off my 300 win mag, 338 win mag, 350 rem mag and 375 h&h is that I simply did not need that much power for anything I was likely to hunt and did not want the recoil that went with them. the 338 fed does appeal to me and I hope it makes it for the long run.