I'd be interested to hear when anyone tries this new Hi-density Extended Range Winchester shot. It's advertised as 55% more dense than std. steel, harder hitting, etc.
http://www.winchester.com/products/newitems/xrwproduct.aspx

I imagine it'll be pricier, too. But if it's that much more effective than steel it might be worth the extra cost. We'll see. First, I need to burn up a couple of boxes of fast steel I've had for a year or so.