I remember reading in one of Jack O'Connor's books that in about 1955 or 1956 someone at Winchester called him and asked if he wanted a rifle made up using their last 7X57 barrel and of course he did. I think it may have became Elanor's rifle. On another note, I remember reading that famous gunsmith Jerry Fisher converted his 7X57 to the new 7MM Rem. Mag. when that cartridge came out. He regretted it.