Yes Marrakai's story was what prompted me to look for one.

He built a .577 2 3/4 NE on a Greener Empire and that is definitely the calibre I am leaning towards. He also gave me the name of the 'smith to contact which I haven't done yet. If all else fails it will stay as a shotgun but will need to be cleaned up a lot from the sellers reports. The bores are said to be good and the action tight. Time will tell.

Marrakai's Greener story.

Greener story

I suppose another choice might be a .375 Flanged in 2 1/2".