What's the specific time for the first shoot on sat pm?
Pm/am squads shoot over two days. These squads start Saturday after Lunch, shoot half of the stages. Then shoot the other half Sunday morning.
I'm not sure if this match will have Friday Pm/Saturday AM squads.
Edit: Lunch is typically around 12. I'd recommend getting to the range early to sign in, find what bay you start on, look over stages, etc.