Just thought I would pass this along. If you are still using corn cob media (like me) and want a good deal, here it is. It is fine enough that it will not get stuck in flash holes and does a hell of a job cleaning and polishing brass with little to no dust.
http://www.drillspot.com/products/521055/econoline_526040g-40_40_lbs_blast_media
http://www.drillspot.com/products/521055/econoline_526040g-40_40_lbs_blast_media