158 grain .357 magnum HP's tend to be too heavily constructed to be of much use in a two legged SD situation. If it is .357 mag power you are looking for the 125 grain projectile is probably the best bet. The blast and recoil will be stout. They make both full house and mid range loads that will be effective.
Another alternative is a heavy buffalo bore .38 +p, they are basically a .38 on the low end of .357 mag ballistics. Both of BB's +p .38 loads will be effective, one is a 125 grain and the other is a 158 grain. So if you are fixed on 158 the Buffalo Bore load is a good one.