The rifle you are referring to with the 4 Bore "bore" was made by Giles Whittome and it shoots conicals that weigh up to 3600grs.
The 2 Bores I build are a true 1.325" groove diameter and shoot a 3500gr Cast Lead Round Ball or a Turned Brass 3500gr Conical.
The reason the double is priced so high is because I really am not interested in building another one, they are very time consuming and difficult to build and the regulation process is brutal and takes weeks to do. That price keeps me from having to deal with a bunch of emails and phone calls and hopefully deters anyone who isn't really serious about wanting one.
Colin
Last edited by CowboyCS; 05/16/13 06:31 AM.