clearing the primer pocket/flash hole of corn cob is not a problem.i think the OP is referring to the corn cob which gets wedged inside the case itself.i fnd in comes out of non resized 222 brass pretty easy,but after resizing the neck back down it can be a pain to get out.i have been using a dental pick lately.it seems to work better than the tweezers/mini screwdriver i was using before.