Howdy folks

I've got a slot for a .50 cal cannon and I fancy one of the nice little Ardesa jobbies from Mr Krank at Pudsey. I've seen them in the shop and pretty much know what to expect - it's just a pistol barrel on a carriage after all. Would love the .69 Napoleon one but I'd never get the barrel in my safe
Anyway, does anyone here actually shoot one of the .50 cal minis?
Could do with knowing about ball and patch sizes, recommended loads for black powder etc.

Thanks!