Belt Sander Grit Question

[Rtr1987]

For those of you that make your own box and scratch calls and use a belt sander, what grit do you use for shaping the box? I currently have 80 grit and it seems like its gonna be too coarse. Any advice would be appreciated!

[SS Calls]

I use 60 grit, sometimes 80, then palm sander with 120, finished with hand sanding with 220.