I got lucky having Martin tune my .22 for 18gr JSB @ 970fps and it also shoots NSA 17.5gr @ 950-ish and NSA 20.2 @ 920-ish very accurately on the same tune, it can be done on one tune but I would think each gun/barrel will decide that.
I can only vouch for 2 of them, PA and SPAW. Ken @ SPAW will tune it to your specs and is a wonderful stand up person, purchased my RAW from him 4 years ago. PA is a big well known store that I have purchased from, good people.
Had an AF....very light and simple. The frame is not stiff so a Maddog stock would take care of that. Accuracy is good, perfect for hunting with oodles of power on tap.