I am interested, so I tapped google;
http://www.dropforging.net/drop-forg...s-forging.html
I'm not a metallurgist or materials guy either, but I had a conversation with Boots Obermeyer on his observations of working with a Hammer Forged barrel. Once you get through the outer work hardened layer, you have softer more stress filled steel, that wasn't so stable...hence hammer forgings are contoured during the forging. I couldn't find it on the Bula site; does Bula do a rear or double lugged receiver?