Like the others have said your going to have to try and see what ammo is best for your gun. From my experience the Taurus line will function with just about everything, but accuracy will differ between each brand. I usually get the Winchester white box from Wallmart or PMC.
For self defense, choose a good hollowpoint from any major manufacturer and you wont go wrong. I prefer the 147 grn rounds for better penetration, but any weight will do. My favorites are the Winchester Ranger, Speer Gold Dot, and the Remington Goldensaber. Federal has a new HP out called the HST that Im going to look at when I get home.