...Barrels don't get stiffer when material is removed from them, no matter the final shape they are machined to. The stiffness of a barrel is a result of the "quantity" of steel used, not the finished shape. Unless the triangular barrel provides a dimension that incorporates more steel, it will not be stiffer than a barrel of round configuration incorporating a like quantity of steel.Many people seem to mistakenly believe that fluting a barrel, for example, causes increased stiffness. Not so! Removing steel decreases stiffness, but certainly, because it increases surface area,it will be an aid to more rapid cooling( and of course reduces weight).

....In my view, a trangle shaped barrel will yield no improvement in rifle performance. Wait and see...OMO..

Last edited by olhippie; 01/06/09.