I believe the Knight bullet/sabot combination you have is a black .45/50 sabot with a .45 bullet. It may be packaged with this Speer bullet: http://<a href="http://www.speer-bul...spx?id=208</a>

Assuming it is black and a .45 bullet, you need the .451-.452 black crush rib sabot, 50 Cal Crushed Rib Sabot for .451-.452 Cal Bullet H15045BR.