i have two catridges that have .268 bullets,about 2.00 case and a .474 rim. one is marked umc 12-06 and the other fa 3-04.first research is showing nothing u.s close to this.frankford arsenal should of been making krag ammo at this time.if any one knows what calliber these are i would be greatful.
30-03 forerunner of the 30-06 was around. I suspect you have brass modified to one of the many 6.5 from that time frame, plus a bunch of wildcats. Somewhere I have some experimental stuff from a guy that worked at the Frankfort arsenal.