I was sighting in my cva optima with 100 grains of pyrodex pellets and the 250 grain tc shockwave today. I was dead on 100 yards and 3 feet, yes 3 feet low at 200! Has anyone seen this? What load does everyone prefer?

Please don't tell me to use 150 grains. I've read a lot of articles from experts that say it's not necessary and a waste of money.