Finally got hold of one.

I puchased yesterday a Greener Empire 12 bore side by side shotgun. Unfortunately sight unseen. Maybe I've been a sucker and purchased a lemon but will in a few weeks find out.

Now I don't want this Greener to remain a shotgun for long. I think it is destined to become a double rifle.

What calibre do our esteemed members suggest it be made into?