I know I'm chiming in a little late on this thread, but thought I would share my personal experience as a relatively new 358 shooter.
About 10 months ago, I was lucky enough to acquire a Savage 99F in 358 Winchester. I spent several months working on loads with different powders (IMR-3031, IMR-4064 and W-748) with Hornady 250 grain Spitzer Interlocks. After coming to the realization that the Bushnell Banner scope I had mounted on the 99 wouldn't take the recoil, I switched to a Vortex scope and settled on W-748 to try with it. I was not disappointed! The load I settled on was 46 grains of W-748 and I was able to go with a COAL of 2.8" in my 99. It would shoot sub-1 inch groups at 100 yards and don't consider myself to be a bench rest shooter by any means.
While moose hunting in October this year, I had a cow and twin calves come busting over a ridge and I flattened both calves (no cow tag of course) on the spot with one shot each (I might add the shots were at 15 yards!). Of course, both bullets exited with massive wounds.
Just thought I would pass this along. Love my 358! I've sold my soul to .35 caliber...