WASR-10 i bought back in 09 for $450, it's a 1971 czech receiver demilled. I assume that the barrel is the same as the receiver, I have a ak-74 muzzle break and a side folding stock with some polymer furniture and a stubby grip so I can load 40 rounders (somewhat) cleanly.
It is fun to plink, it will certainly take anything you feel like feeding it and the sight of shooting it at night rapid fire is something to behold; also mine shoots the casings out about 20 yards.
It's a fun gun, I would trust it up to maybe 50-75 yards; follow ups and double taps are harder than with an ar, I don't care what someone else has to say about it, they are. If you plan on doing competition you are putting yourself at a disadvantage, but they are definately rewarding to shoot, flashers at 100 yards move almost as much as a .308.
That being said I wouldn't buy another AK, you have to think that by the end of the vietnam war the russians had ditched the 7.62X39 for the 5.45X39, despite what was said about our 5.56 and how the AK round was so much more effective.
Bullet size is not the determining factor it is shot placement, I was shot in the calf nearly point blank with a .357 hollowpoint and I walked down to the paramedics.