Port velocity average target fps?

Wouldn't you need to understand why they target FPS in the first place to be able to figure that out?
You know you come off as condescending, obviously I understand why it's important to keep fuel suspended in the air and that fps plays a role but still doesn't give the target average fps for builds were generally talking about. I understand why you don't want to go to high or low but what is just right? For now I'm working off the assumption of around 300 fps until I find out better.