I just started reloading. I have a rock tumbler I bought from harbor freight.
http://www.harborfreight.com/dual-dr...ler-67632.html
I use a 2lb stainless steel media "refresh" kit I bought from
http://www.stainlesstumblingmedia.com. Works like a charm. Though it's a wet tumble. Not sure your tumbler would handle wet media. I have to say the stainless media plus a little dish soap and vinegar works great.