I forget where but one of the better bbl manufacturers had a whole report on bbl fluting and it pretty much explained and showed how it's more cosmetic than anything.
Stiffness...ok, so why aren't really BIG bbls fluted (warship bbls for example) Surely they especially need stiffness.
Cooling: Theorymakes senceI guess but how many of us really shoot a bbl so darn fast that it gets hot enough so that a few flutes giving a fractional amount increase in surface area will be a big benifit? However, why then don't all the machine gun/automatic firearms have fluted bbls? Surely they especially would need extra surface for bbl cooling given the rate of fire they are capable of. When does one shoot so fast in a manual activated firearm that cooling becomes an issue?
I'm unconvinced fluting is anything other than cosmetic and that marketing simply make it a tactical, must-have, oh so important feature.
Actually what is fluitng anyways? it's longitudinal cuts in the bbls surface. Hmmm...rifling is just longitudinal cuts in the surface of the bbls bore. So...wouldn't rifling actually be specialized rifling?