I purchased a cheap ultrasonic cleaner from Harbor Freight and have been cleaning my de-primed and resized cases for about 6 to 8 minutes. Works great! Not only are the cases bright (not as shiney as tumbling but very clean), the primer pockets and inside of the cases is perfectly clean! A little tumbling after that would certainly shine them up. I use a forumla I got from someone on the internet (name escapes me now) of 50% water, 50% white vinegar, about 1/8 tsp. of baking soda, and a drop or two of dish detergent. I set it for about 480 seconds with the little heater on and when I pull them out I rinse them in clean cold water and clean them two or three at a time with a blowgun hooked up to an air compressor. After blowing inside the case and in the primer pocket they are completely clean from any fouling, etc. Sounds like a lot of work but it really isn't. I can only clean about 30 or so cases at a time but it goes pretty fast. I can use the same cleaning formula 3 or 4 times depending upon the condition of the cases. Numbers of cases cleaned is determined by the size of the ultrasonic cleaner. A big one would clean a lot more but big ones are expensive. The very best thing about it is it cleans the primer pockets and ALL the insides of the case as clean as the outside of the case!
