3 pellet loads in a modern cva is fine if its rated for it. Its not needed and clearly will not always be the most accurate.
The down side to pellets "the rookie stuff" is they go bad within a year, you pay up the rear end for only 25 to 50 shots depending if you use 2 or 3 pellets. The biggest concern is the moisture they suck up. A package of my T7 pellets i recently opened were crumbling and needless to say, accuracy wasnt even there at only 50 yards.
Biggest deal and some others have voiced, the ability of fine tuning your charge to hit that sweet spot the rifle loves, isn't there.