Another great gun to plink with is a .38 taurus revolver i have one & its great, the wad cutters aren't too expensive & after plinking 30-40 rounds your spent anyways.
9 millys are great to pink with but then again expensive....
If you need some sources to buy hit me up on icq, i know a couple of gun ebays where you can get great stuff.
You can get hungarian AK-47's for $150, & a kit where you can strap 3 AK's onto a carriage wit 50 round clips & turn it into a gattling gun
icq 147850026 hitting the sack right now but i'll hit you up in the morning if you contact me