Please don't use ceramic BBs while playing with other people, you could really hurt someone. 5.98 is actually useless in a P*, the system works much better with widebores such as the Orga Magnus. With the 5.98mm barrel you'll be cleaning that thing all the time, literally. A bore that tight also provides a smaller air cushion for your BB, thus decreasing accuracy and increasing FPS. 10/10 @ 230' is obtainable, but you'll spend quite a bit of time and money on upgrades. The link to Rap4 is also unnecessary.
Welcome to the forum Leonard.
Oreo
Welcome to the forum Leonard.
Oreo