I've been using a lot of Lightning hard cast for plinking via Graf the past couple years. They're fairly consistent, and while I wouldn't consider them cheap, they're still pretty reasonable when you buy in quantity. Whatever lube they use on them does produce quite a bit of smoke though, which can be either a pro or con, depending on your point of view.

I used to shoot Hunter's Supply, but thier quality control really took a dump a couple years back, wouldn't touch them with a 10 foot pole now. The last few boxes I got had drastic diameter and weight variations. If I'm gonna pay for bullets, I don't want to be sorting them just to be able to hit plinking gongs.