" WSP, how did you crown the barrel yourself? "
Very simple. I have a couple of round nose stones, the type that can be chucked into a drill. I carefully installed brass spuds in the noses of the stones, to accept appropriately sized lead DEWC bullets, drilled through and sized to fit inside the barrel and ride against the lands. These serve as "pilots", to cause the stones to run true and thus cause the crown to be cut concentric with the bore.
After cutting (grinding ?) the crown, I polish it using a round nose brass machine screw, chucked into a drill and coated with a fine abrasive, such as Flitz.
I've crowned 5 or 6 barrels this way to date....and all shoot like factory crowned ones. I can do a crown and polish job on a barrel in less than 30 minutes this way.