When going with several other people, such as a Prairie Dog shoot, I try to use my hard cases, as we are always loading the rifles and other equipment at different times...some of us live quite a ways apart and seldom meet at one location and load all at once, so some things get on the bottom of the pile...
If I'm just running to the range or out in the field alone (or with just one other person), then the soft cases are nice..as I have a separate container that holds my ammo and other supplies..