Common wisdom (not necessarily true but..) tells me that for expansion: hollow point>semi-jacket flat tip>FMJ. For penetration: FMJ>semi-jacket flat tip>hollow point.
The .357 magnum seems to be best known for it's penetration. I figure since I can't get anything like a discarding sabot round with a fin stabilized depleted uranium penetrator, a 158 grain FMJ bullet is going to give me the most commercially available penetration.
This is the ammo I'm looking at.
The purpose of this ammo for me would be self defense against large non-person targets such as bear, moose, Ford Explorer, and the very rare goblin with body armor and a 2" skull (rendering headshots impractical for one of my skill level).
So, is there any real value in getting FMJ for a .357 mag? Is the difference in penetration even noteworthy (experience with other ammo types should be applicable)? Do I really need to worry about a .357 not penetrating something I might need dead?