BrushPopper
For something a lot cheaper to shoot, buy a box of 200gr. Hornady's 10mm XTP's. They shoot pretty darn good.
Get thetan sabots from MMP for these bullets:
http://www.mmpsabots.com/
These may not be the prettiest bullet or even the fastest - but they are deadly...
Buying your bullets in bulk and the sabots separately is the least exspenive way to go - plus you can afford to shoot them at paper and in the field.