I'm guessing radiant heat. More surface area means more cooling. So ideally, ventilated ribs would offer the most surface area and would be the best at dissipating heat.How can they dissipate heat when they close in the two barrels limiting the flow of air between them????
The ribs will draw heat from the barrels and, like a radiator, provide greater surface area exposed to cooling air. So, the ribs probably cool the barrel(s) somewhat quicker. But I guess it could depend on the rib design.Dolby,
I would have to differ with you 100% the side ribbed barrels would retain more heat, the ventilation would be less with the side ribs less air flow for cooling than open barrels, but the side ribs would stabalize the barrels retain the point of impact in expansion if you used the under or over barrel one more than the other. The side ribs donot allow you to change the inpact point with barrel adjustments, you would have to change the impact point of barrels with side ribs with the comb adjustment.