http://www.trapshooters.com/reloadcalc.htm

The above link will help you figure out exactly what your reloading costs/box are for shot shells...

I buy components in bulk and my loads are costing right around 3bucks a box depending on what is in them, I just bought 3 flats of pretty decent shells for $3.50/box including tax...I'm still using my hand loads for serious shoots but I'm trying out the store-bought ones and they work good.

Doug