Stock, they are usually around 27-28FPE. JSB 15.89g or 18.1g domed pellets usually shoot well, with 21g Barracuda Match shooting better in some. Mine have liked the JSBs, which also seem to load smoother.
I do not recommend you adjusting the regulator wheel back and forth. From my testing with a plenum gauge, the wheel is very imprecise. You can get it back in the same physical location, but the pressure, and hence the velocity, is not what it was. Also, to adjust it, you have to degas the gun, which will be a royal PITA for hand pumping. Unlikely you need more power at your suburbia location. Three acres is allot for your location, but a bad ricochet could put you hot water with your neighbors. If you want a little more power, shimming the hammer spring is easy and reversable.
I would put off getting the parts gun, until you know you are happy with the warrentee gun. I'd also reconsider the wood stock. The weight savings would be mainly for when walking in the field. Freehand shooting this very full size airgun, will be a challenge for both. My bet is, you will end up with a rest, such as sticks, bag, or bipod for the majority of your shooting.