16" barrel, WOW!
I have no clue whatcha might call it either, but much like Roaddog, I betcha that would make a fine Grouse Gun!
Minute of Deer at 25 yds ain't no real slouch either.
Either way you slice it, that has got to be one fun-gun!
Keep us posted on what she does should you ever put her on paper to check the pattern.
One of our Charter Members (Gobbler) once posted that with a similar gun, similar short barrel, .72 bore, he was able to get pretty good patterns at 30 yds. with no muss, no fuss, no special loadings. Makes me wonder what that one might do.
Uncle Russ...