Earlier this summer I was at Tishomingo, OK, for a class with Bob Snapp on single shot rifles.  He's been building custom rifles for several years using seven-sided barrels...at first glance, I didn't pick up on the odd number of flats on his rifle.  My eyes are so used to looking at eight flats, that I missed it.  Besides appearance, the main benefit of his barrel form is in stock making.

David
Montezuma, IA