I have never seen the Lake City T291 packed in cartons. All that I have, or have seen, are packed in clips, in ammunition boxes. I have been looking for a carton for several years and have never seen one, and I know of no one who has.
Lake City T291 was intended to familiarize Lake City Arsenal with the manufacture of the new Cal .30 Match ammunition. The LC ammunition is somewhat of an enigma. Ordnance notes indicate that 2 lots were made but I have already identified 6. As far as I know, none of the ammunition was ever issued except for testing and practice, and that could explain the lack of any in cartons.
I’d sure like to hear from anyone who has seen any of the LC T291, except as loose cartridges.