RCBS CAse Cleaning Media can be used in any vibratory tumbler or in the RCBS Sidewinder rotary case tumbler. Formual 1 is walnut hull ground to 12-12 Sieve size for fast cleaning of dirty cases. Use Formula 2 ground corn cob for a final high luster polish. Polishing compound powder comes in 5 - 0.6 oz packages for easy addition to your tumbler media.
Big Book Catalog, Issue:66, Page:519
Sinclair, Issue:4A, Page:077