Don't bother trying to find 358 brass just neck up 308 brass by running it through a 358 full lenth sizing die, I do this and easily get close to ten loadings from a case.
Plenty of good loads listed everywhere, my Ruger Frontier loves 250 Hornady's with 40 grains of IMR 4198.
In my opinion its a waist of money to buy expensive bullets, Hornady interlocks Sierra Game kings or Speers will do every thing needed at the velocities of the .358
Another good one is the 205 grain gas checked hard cast from The Bullet Barn, deadly on deer.
Also a good semi close range varmit gun. Load the 158 grain Hornady XTP pistol bullet [designed for about 1200 fps] up to 2700, its quite accurate and terminal performance is extreme.