Biff Mayhem
I do not know what you are leading to, but TC has contracted Hornady to supply them with 10mm 200 grain, .452 250, & .452 300 grain bullets named Shockwaves. Hornady makes them proprietary to TC by changing the color of the tip. Hornady does make make a 10mm 200 grain XTP, TC contracted to Hornady for the XTP's with a Polymere tip and again proprietary to TC.
Hornady has a contract with MMP to supply them sabots for their SST's (HPH-12's)
TC has a contract with MMP to supply them with sabots (HPH-24's and HPH 40/50) sabots. TC has also contracted MMP to build the special EZ load yellow sabot which are also propietary to TC.