Winchester makesthe gun. AndI was taking about 4 seconds between the first 3 shots...after that I couldnt even hold onto the forearm it was so hot, so I waited about 5 or 6 minutes untill I shot again.

This is the reason why I thaught it could be due to the barrel's shape or possible the metal that was used to make the barrel. But I have 2 other octagon barrels on guns that don't get that hot; atleast not that quick....they do infact get hot to the touch but its more like after 12-15 rounds of very fast shooting without a pause at all.