I found some spare time to clean additional casings today. The process went much better and most of the casings looked very clean and sparkly!!!
I did two things differently today than I did them in my earlier attempt at cleaning casings ultrasonically. I DID NOT use the plastic basket. Rather, I just set the beakers in the stainless steel tank. The other thing I changed was that I thoroughly rinsed the casings and the beaker after each step of the procedure was finished except after the distilled water portion.
Here is my makeshift area for the US cleaning machine on the west wall of my reloading room. I have a sink with hot and cold running water located just to the north about 5 feet and east about 8 feet from where this chest-type freezer sits.
I cleaned 73 of my .17 Remington casings on my first run of the afternoon. I used two of the 400 mL beakers and had 37 casings in one beaker and 36 in the other. I drained contaminated fluids off the casing thoroughly and then rinsed the casings with warm tap water until all contaminants were rinsed out and off. These 73 casings came out sparkling clean, even the outside of the necks. These were once-fired casings I purchased on the Internet from a fellow named J. McComas.
I decided to clean 40 of the .17 Remington casings I neck turned for use in my new Pac-Nor barreled .17 Remington with the .1945" neck. They cleaned up spic and span, but of course the necks were bright and shiny to start with!!!
The casings for my Pac-Nor barreled .17 Remington are in the 3rd and 4th rows from the top.
Most of the casings in the bottom row of the photo above are casings I purchased from Southern Belle Brass located in Cordova, TN. This brass was supposed to be once-fired brass as well. There are 4 or 5 casings mixed in with these 23 casings that were neck turned and are shiny. Notice that the rest of necks on those casings are still quite dark.
Here is a closeup of two casings, one from each source.
I guess I can always use some 0000 steel wool and clean the necks up, but I'm wondering why these Southern Belle Brass casings don't clean up through this ultrasonic procedure like the other casings do???? It is strange indeed.
I am very pleased with the process and like you mentioned in the article, even though it does take some time, the time spent is well worth it IMHO. Thanks again!!!