28 Cal. US XPL

The notes I have with this cartridge states that it was originally from Bill Woodin via the collection of the late Peter Skala. It has been floating around in the unidentified tray for a long time and I have not been able to find any info either in the ECRA Database or HWS. The note on the cartridge states “28 US EXP”. I cannot make out if the number above is 19510 or #510, it becomed more blurred under higher magnification. The bullet is GM non-magnetic with a small hollow tip. The headstamp was removed, but the original was FA 38 NM.