Been looking into getting a shotgun for a bit and went to a gun show and bought a mossberg 500 with 30" full choke. This is the first shotgun iv owned and know really nothing. Im looking to get into deer hunting and mabey try other game. Plus i like to go to the range and shoot. So with this setup what am i going to be able to do with it and what ammo? If i need a new barrel what should i be looking for? I picked this up for $100 this good, avg, or bad?