Here is a link to a very similar thread that I started, seems as the mistake I made was using pet store media and pouring the polish in with the .223 cartridges at the same time. It expanded in side the bottle neck cartridge and it took me a long time to dig the media out of rifle cartridge. Dont think it would matter with a straight walled pistol cartridge or a larger caliber rifle.
http://thefiringline.com/forums/showthread.php?t=448432