Daystate Mk3 performance question

Hi all,

Recently acquired a used but in pristine condition Daystate Mk3 (B2) in .22, FAC. Only thing I had to do was replace the 2 battery packs; no leaks, no out of line condition. Only worry is think she's kinda slow, doing 765-770 with JSB 18.1 grain pellets. Power level has been reset to max and bolt o-ring has been replaced. Believe she should be shooting at a bit higher speeds with this ammo, maybe mid 800s. Am I asking too much of her or is this about right for this "older" version? Your input is appreciated.

Saludos,

Pedro in PR