Ultra Sonic
I have been using Ultra Sonic cleaning for about two years with no problems what so ever. After much researching, the folks that bought the less powerful units have had problems. I got the one for $399.00 from Brownell's. I know a lot of money but well worth it. My routine is to take fired brass & use a universal de-primer and then put the brass neck down in a 1000ml glass lab beaker. The solution is 1/2 water & 1/2 white vinegar from Sam's Club with about three drops of Dawn dish soap. 1/2 - 1 hour & the brass comes out with no fouling in the neck, primer pocket, or interior. I then put the brass in a baggy with some liquid RCBS resizing lube squirted in the baggy. Mix brass around and then resize. I then use the RCBS water case cleaner to polish the brass. You can save some time by running Birchwood Casey liquid case cleaner. Jason Baney is the one who should get the credit for this time saving procedure of the Ultra Sonic cleaning. While it may take a little extra time. You get very clean brass inside and out.
Semper Fi