Here's my personal 777 conversion chart I use in my Knight USAK for 100yd shots:

400gr sabot - 125gr CleanShot - 120gr Pyro RS - 100 to 105gr 777

350gr sabot - 110gr CleanShot - 105gr Pyro RS - 90gr 777

300gr sabot - 95gr CleanShot - 90gr Pyro RS - 80gr 777

*** the 400gr sabot work-up for 777 is an estimate as I haven't worked that load to it's full potential as of yet ***

"Every moving thing that liveth, I give unto you as meat" (Gen 9:3)

Trust God..........but keep your powder dry!