First time using my ultrasonic cleaner! Once fired brass~ : r/reloading

Got RCBS 30-06 dies and it did this. Returned it and got another one just to check and also did the same thing. This normal or is my luck that bad?

Sonic Cleaning - Primer Pocket : r/reloading

Ultrasonic cleaner reccomendation? : r/reloading

Best Ultrasonic Brass Cleaning Solution:1 Gallon Bottle – Northwest Enterprises, LLC

Cleaning Brass with the RCBS Ultrasonic Cleaner – Ultimate Reloader

Tested out an ultrasonic cleaner I got in a job lot recently, followed by drying in the oven for 15 mins, there is some discolouration to this piece of brass, is this

9mm brass : r/reloading

Frankford Arsenal Ultrasonic Brass Cleaning Solution for Rotary Tumbler, Cleaning and Reloading 32 Fl Oz (Pack of 1) : Gun Ammunition And Magazine Pouches : Sports & Outdoors

Once Fired Brass - Reloading

Top Brass Premium Reconditioned Once Fired Brass 50 BMG Box of 10

Frankford Arsenal Ultrasonic Brass Cleaning Solution for Rotary Tumbler, Cleaning and Reloading 32 Fl Oz (Pack of 1) : Gun Ammunition And Magazine Pouches : Sports & Outdoors

CREWORKS Ultrasonic Cleaner with Heater and Timer, 600W 30L Digital Sonic Cavitation Machine, 8 gal Stainless Steel Jewelry Cleaner for Professional Tool Watch Glasses Retainer Denture Parts Cleaning : Industrial & Scientific