i installed a dishwasher in my garage ( used I pulled out of a kitchen remodel) I put it in bags and throw it in... same with boat parts. works great, just never ever do it with the one in the kitchen unless the wife is out of state... just saying.
When we were both Trapshooting every week, we were going through about 250 rounds of Trap Loads every week. I would wash the empty 12 ga. hulls in the dishwasher. I would put them in the zippered mesh bags, and put 2 in the top rack, and 2 in the bottom. Then run it on the pot scrubber cycle. They would come out spotless both inside and out.
I would then spread them out on towels and let them dry. It took off all of the carbon around the crimp area. Your hands didn't get dirty handling them, and it didn't allow carbon and crap to pack up inside the crimping dies on my loader. My shells always looked like factory new, and not reloads. All the guys at the gun club asked me how I did it, and they all started doing the same thing.
Someone mentioned how we were all going to die from lead poisoning from washing our dishes in the same machine. That won't happen because the shot sits inside the wad cup, and never touches the inside of the hull except the small area at the very front of the crimp. And even that is protected by the sides of the wad as it exits the hull on firing. Besides, the pot scrubber cycle uses several rinses.
You just have to make sure YOU HAVE THE DRYING HEAT OFF! Otherwise you'll have a giant glob of melted plastic in the bottom of your dishwasher.