What popplecop is seeing in those actions is actually the tar-like residue of burned oil. People who overlube their semi-autos are causing the problem they're trying to eliminate.
The dry lube on the bullets is almost all a .22 ever needs.
I pull a dry Boresnake through my rimfires once a year. That's the only bore cleaning I ever do. I spritz the action of my 10-22 lightly with Corrosion X at the same time.
Corrosion X is a high-tech non-petroleum cleaner/lube/preservative designed for marine use. It's amazing in a .22. Powder ash and other cruds just falls off the metal in a gray powder - no crud ever builds up and the metal stays lubed and rustfree.
Another superb non-petroleum product is EZEE-OX. Again, no oil in it to turn to tar and it leaves a dry film behind after it cleans.
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