I think you will be rolling your own in order to get this one up and running. I would start by slugging the bore and doing a chamber cast. Most likely designed as a bullet gun but it may stabilize rb as well. Try Jeff Tanner in the UK for ball molds, he is fast and very reasonable. Best of luck with it,
Steve


www.bertramandco.com ACGG Pro
Pope Leo is my war hero
[Linked Image from i.imgur.com]