That's some fine shootin' for sure, offhand35! I have always ben intrigued by those underhammers, but have never shot one.
The Huntsman is capable of shooting groups like that at 50yds for sure, just not sure if anyones done it with open sights though. I have some close to that with the aide of a scope, so its capable in the right hands such as yours.
I have heard that the new Huntsman barrels are being returned with the new Williams Fire-Sights instead of the junk plastic ones. It's about time!
My SS Huntsman likes everything I have ever shot out of it, from 220 grain Sabots to 460 grain No Excuses Conicals. :grin: