One thing to keep in mind is that most all pellets will not like to be pushed too hard or too fast. The common fps cap recommendation for pellets is 850-880. Some pellets in some setups with some tunes will do well at faster speeds, but that is not the norm.
The air charge your pcp releases to push a pellet matters too. If the air charge is too aggressive even at slow speeds, you can disrupt flight out of the muzzle.
Some of us run very fast pellet speeds for hunting purposes, but there are drawbacks. For example my M3 Impact is setup to push 22Cal Hades at about 990fps right now. I get good groups out to about 60yds, but then the pellets veer off and really open up my groups. If I wanted to get a pellet out further I would choose a heavier pellet, slow it down, and tune for max accuracy.
Pellets are very very sensitive and have terrible ballistic properties. They can spiral through the air like a plane missing a wing, or randomly take a right turn etc. They like being lobbed gently toward your target, and can provide some terrific accuracy if you treat them right. So when deciding for a target tune and fps, its good to understand how pellets act/react.