In the chase for accuracy and precision, most of us clean and sort our pellets. Everyone has their preferred method of washing and what soap/degreaser to use. I recently had some problems with what I thought was a very thorough system which I would like to share to enable other marksmen on this forum to avoid this particular pitfall.
I bought an ultrasonic cleaner some months ago and when cleaning pellets had to be done, I hauled it out and filled with some dishwash liquid and water. I set the temp on 40 deg C and put a tray of 500 JSB Monsters in for 10 minutes.
After rinsing and drying I noticed some damage to some of the pellets. I didnt think the ultrasonic action would damage the pellets, but it clearly did. The next batch I only did 3 minutes and they came out shining and clean.
I then put a few pellets in for 40 mins to see what would happen....the results below.