What has been posted explains what to do to firearm but how about the cases if you intend to reload ? How soon do you need to clean them out ? I have also heard that using cases w/ corrosive primers WILL ALWAYS leave a minute deposit in bore ! Don't know if that is an "Old Armorer's Tale" or something dreamed up. I have better than 300 rds never fired of WCC 58 (308 Win) w/ corrosive primer. Had better than 500 but pulled bullets and dumped powder then deprimed. I just didn't want an issue in the match rifle this brass is going to be used.