OK, a few notes:
1. Gamo Raptors are VERY LIGHT pellets, thus they loose energy faster than a heave, lead pellet. I would not recommend those pellets for such a powerful gun.
2. I would use domed pellets for your purpose, and if you are having penetration problems, you can try those that have a steel BB insterted in the top (never used it myself, but I have goten plenty of game with the RWS Sueprdomes).
3. I dont know about the 800X (dont have one), but the 1000X has plenty of power for small game at 35 yards. As for Crows and such, I have taken them out at over 50 yards (closer to 70, actually).
4. For small gme, .22 is preferable because of energy transfer, but the .177 is my favorite because of flatter trajectory (the heavier pellets transfer more energy to the target, but travel slower and thus have more arc).
Felipe