what is the story on chamber length of two ithacas they list? one is listed as 70mm and second as 76mm. these guns are proly not marked by manufacturer as to chamber length and when all? winchester 1897s and model 12 12ga guns are 70mm i suppose anything is possible. so, is it if they have it for sale it's original but when you sell to them it's "punched out". that seems to be the annoying mo.