There are a number of false premises in your original post. Start with this one.
FPS alone does not tell you how much damage will be caused but it can tell you if the bullet will expand.
It is clear that your experience and knowledge are limited, or else you have been given a bunch of outdated/bad information.
That, combined with your low post count, leads me to the following advice:
Spend a year here reading a lot and posting a little. The occasional question, yes...but most questions have already been answered many times over (see Frank's post #14) and a search will help with that.