I understand that polygonal bores give better barrel life too.
Less pressure from lower bullet engraving area. Less overall barrel pressures seem to increase the polygonal barrel life. They also tend to be faster. I am referring to true polygonal rifling like BHW uses not the basterdized rounded edge barrels that claim they are polygonal.
Cleaning is also easier and based on the thousands of rounds I've put through BHW barrels there is no question in my mind that fouling is less with them.
Greg
