If the doors open at 9:00am, the line will start forming at least as early as 8:00am. The ammo vendors are typically set up on the north/northeast side of the room (enter through the doors and go left). If you're okay with reloads for range ammo, Collins Cartridge Company is good quality stuff with not-so-bad pricing. They're usually at most of the GRB shows.Pretty scarce at the shows? I haven't been to a gun show in several years.