That's my question, how do you decide which bullet weight to use?
I've said this before but I settled on Speer Gold Dot 9mm 124 grain +P because I literally sent an email to Kathy Jackson (Cornered Cat) and asked her what she used.
She told me what she used and referred me to Dr. Roberts' list.
Asking her was all the research I did.
So how do you choose? Why would you use a 115 grain over a 124 grain or why would you pick a 147 grain over a 115 grain?