Air Arms Owners Club

Hello all new boy here, my name is phil and iv recently got myself a new airgun, first since I was a lad, currently have a tx200hc with a hawke vantage mil dot ao ir 3-9x50 on top,im not happy with the hawke as it seems to lose its zero a lot and im forever altering it, so im after a new scope but which one ? iv been looking or should I say reading about Nikon prostaff 3-9x40 bdc, I know this is more a centre fire scope but have read they can be re parralaxed for airguns but will they stand up to the recoil of the airgun ? The scope will be used for target shooting and hunting mainly, I would like to here from anybody who uses these or is there some thing else I should be looking at, im looking at paying about £150 and I quite like a mill dot type reticule if that's any help.
thanks for looking phil.