Thanks for the Ideas fellas. I'll try the ultrasonic route first, because I'm nervous about scratching up the bolt.
And 10-4 regarding cleaning it right away.
I'm slightly OCD and like to get every speck of carbon off the Bolt Tail region. I bought a BONE tool from OTIS, and it does not work well.
What does work is soaking the bolt in Hoppes, scraping it with the wooden end of a Q-tip, wiping it a cloth, rinse and repeat numerous times. But this...