The buccaneer comes shooting too fast from the factory. 8.44 aa were over 1000 fps.
My nephew just got this gun a couple weeks ago. He has limited air availability so I wanted to tune it down to be accurate as well as efficient for him. In stock form, it did shoot the 10.34 descent at around 940 if I remember correctly. The 8.44 were not that great. We adjusted the hs back a good bit until the shot curve was nearly flat, around 890-900 fps, from a 2500 psi fill down to 1000 psi. Over 2500 and velocity is very slow. He gets 80-90 shots on a fill, which is great in my estimation. This was with pellets in the 8-8.5 range.
Surprisingly the most accurate pellet we tested was the cheap daisy hollow points that can be had on amazon for $5/tin of 500. We only tried 5 or 6 kinds, but it out performed the aa 8.44, jsb 10.34, as well as a few others. The gun is still new and breaking in so we'll have to reserve judgment for a while and until we've tried a few different pellets.