don't know if it helps but I use 777 fffg in my ROA, my powder is by weight and not volume. I weigh the powder at home and put it in small glass phials. I am currently using 14.5gn, a 1/2" fibre wad (between powder and bullet) and a home cast Lee 220gn conical reversed to be a wad cutter. this load works really well for me cuts nice clean holes and I can group sub 4" at 20yds. I do not put any gunk on top of the bullet to seal the chamber as the wad and bullet do it.
hope it helps
Rick
It's not my faulty, I was just.....