I would not be as afraid of the water as I would the "tumbling" effect of the washer and dryer! It is a bad idea to tumble load rounds! If the brass is not filled with powder to the base of the bullet the powder will tumble inside the case! This tumbling inside the case can break down the powder which can change the burning rate of that powder! Depending on the powder and the amount of powder it could be possible to exceed pressure limits of the round and or gun! Tumble brass not loaded rounds, IMHO!
jcelect