30mm T306E10 projectile

Found in a junk bin at SLICS

Links I’ve found about the T306E10
http://www.bocn.co.uk/vbforum/threads/70676-30mm-Shirgun-Rounds

The Shirgun 30mm severely rebated rim design is crazy!
http://www.bocn.co.uk/vbforum/threads/55564-30-x-136-rr-t-328

Stamp on the driving band is

  • GM1-1-6-54-30MM-T306E10 *