i went out in my shop, grabbed a crusty 17 barrel out of the pile of crusty rustys i have pulled.
dropped it on the concrete driveway a few times for good measure, and dressed the crown with a RCBS case trimmer primer pocket tool.
though this is not the correct way to dress a crown, it will work in a pinch, lack of funds, or on just a cheap rifle is in order.
i didnt go very deap, and if i were actually going to use this barrel, i would have gone a little more, and likely dressed the crown itself with sandpaper ect..but you see what i was getting at.