It depends, what do you use as barrels? Most of the darts we make down here will be too thick for CPVC and 17/32 brass. I had 200+ at fall SENO but still had to pick up darts.
Why would my barrel material matter? I use cpvc and my darts also fit 17/32 nicely...
But would 75 be enough?
Barrel material matters because if you have to pick up darts on the field, they won't work in your barrels.