Cory...If you can,you should make your bullet trap out of wood...
Put in some old phone books or something like that in the front and
then sand in behind them..This has always worked for me..Make it
big enough so that your shots will all connect with it..After a few
months you can clean it out and retreve all your bullets or round
balls..The wood gives you a place to tack your targets to.

Hows the job hunt working out for you?