New Wildcat MK2 in 25 cal

That looks about right. But, my WC's both took maybe 200 shots to break in and settle before I started getting good, consistent numbers.

I would just shoot it for a while. Just put some pellets through and let the gun have a chance to settle in. Then maybe do a 40 shot string and see what you are looking at. I think my .25 was shooting about 915 with the 25's. And I think it shot the 34's at around 830's. Those are both good numbers for that pellet. I think that tune was intentional. 

Crusher

I got one in last week, and see around the same numbers as you.

Is this the compact or standard version?

I have the standard .25 mk2. The highest I’ve gotten so far was 919 fps with 25.39 JSBs unsorted. I’ve only ran about 80 pellets through it.