I recently just purchased my first firearm, a SW99 40 CAL. seeing as how the SW99 and the P99 are interchangable in many ways i thought this would be an appropriate place to post. I have done a lot of reading but haven't found much info on bullet specs. What are the best bullets to use for this gun? What do you use for performance, practice, and what are the costs? What is meant by a bullets grain? Thank you!