Thought provoking stuff. Forgive my ignorance but when loading the lyman solids are you using a standard shot wad over the powder and what sort of crimp. Excellent tip re hardening. Good practical advice. I reckon there is a book in this from you Daryl, you have obviously put a lot of time, thought and effort into your shotgun/bore rifle r&d.
Interesting point re the Forsyth book. I remember reading something similar (beggared if I remember
the author) with regard to the shotgun as a general purpose unit in India pre WW2. I think
using lg in one barrel and a solid (unspecified type) in the other. I gather this was not an uncommon practice in India,and continued for many years (something to do with Indian laws re rifled arms, not sure though) perhaps our Indian or historically orientated members could comment.