Does anyone have info on which , if either, is more accurate-round or octagon. I'll be purchasing a Pedersoli Sharps and can't make up my mind. Thank you.

Odds are they are both cut out of the same type of barrel blank, and very doubtful that you could prove any difference.

Thought I saw somewhere where Octagon barrels are stiffer and less effected by barrel harmonic's than round?? Not that its a major concern here but something to think about.

Could be. Shooting black powder with open sights.... not likely anyone on earth could prove the difference. Interesting point, though.

I would thing that unless the octagonal flats where machined to absolute perfection, as far as symetry goes, that you'd have a higher possibility of bad harmonics. As far as octagonals being stiffer, I don't see how that would be possible unless you talking comparing the barrels per weight instead of the actual outside diameter at it's greatest point. I don't know one way or the other, but it's an interesting question. Try a half round, half octagon, they look good and you won't kick yourself for buying one or the other.

Ok, remembered where I saw this at, look under "fluted",

http://www.badgerbarrelsinc.com/barrel%20specifics.htm?102,9

In the late 1870s, the Sharps' catalogs had a lot to say about the difference in consistent accuracy between the octagon and round barrels. They had found that the round barrels seemed to be more consistent, especially at long range. That is probably why most Creedmoor target rifles of the time used round barrels as long and heavy as possible and still meeting the 10 pound total weight limit for the gun. In all the Shiloh and C.Sharps rifles I have worked with, I have found that full round and half round/half octagon barrels are more consisently accurate.