Just got an unfired 30-06 Remington 721. Dont need it but bought it cheap enough and around here they are really not seen much...much less unfired. I wondered what type of method they rifled with at Remington back then {late 40's} and a quick look with the borescope showed something strange. There are tooling marks running across/perpendicular on both the lands and grooves. I kind of expected to see a button or maybe even a cut rifled barrel but it is definately not cut and it would seem a button swaging .004" deep grooves and lands would "iron" out these reamer marks. Hammer forged maybe??