Well shoot....
I have 3 Lee molds I was going to try with this gun
Lee 451RB = .451"
Lee 450-200-1R = .450"
Lee 452-255-RF (not sure if this one would work)
I also have some 45 cal molds that drop around .453-454 but they are standard bullets. Should I slug this barrel to see what I need or is that not necessary on BP guns? What about powder coating to increase diameter?