Recall if you will high school geometry class. Or at least look at the trusses in your attic. The triangle is the stiffest geometric form. It would also follow that the triangle shaped barrel would trump a round barrel in the heat dissipation department.
I am of the opinion that the triangle shaped barrel would be vastly superior to a round barrel.. for a jack handle. I picked up one of them at the local firearms emporium. I do not remember which model it was. I was greatly impressed by the mass of the thing.
