Waiting on my SA-20 to arrive and plan on taking it straight to the range to cycle some ammo through it, get to know it, and sight it in. The (closest) range here only allows you to shoot slugs. Being a novice at shotguns what would you guys suggest to purchase and where? Looking to throw about 100 rounds down range, don't want to be frustrated by cheap crap, but still want it to be economical... BTW are there any acronyms for shotgun ammo? I understand a 5.56, 7.62, and 50 cal... but geez all the choices with shotgun ammo has my head spinning. :shock: