I've heard about Silvertips being too soft. I remember reading that there were two versions, with the softer one being responsible for the bad reputation.
If I use the .358 I'd use from my stash of Hornady 200 Grain interlock SP ammunition. If you believe their web site, they are rated for game up to 1,500 lbs, which is a hell of a lot bigger than anything I'm going to see.
They are factory loaded and the literature says they leave the muzzle at 2,475 fps with 2,720 foot pounds of energy.
