Tumbling - What Media???

[rhuff]

Originally Posted by sheepherder

James -

What does the '20/40' stand for??

That stands for the size of the corncob particles. Corncob is used in abrasive blasting of various surfaces, and the size has to match the nozzles/expected results.

In reloading, this size works very well because it does not get stuck in the flash holes(a lot of reloaders remove the spent primers before they clean the cases). If you do not remove the primes first then you can use a smaller size corncob particle as the decapping pin would remove any stuck corncob when it removes the spent primer.