I would recommend the .17 HMR, much flatter trajectory, about 500-600 fps faster, generally more accurate,and contrary to popular belief, less wind drift than the .22 WMR due to the bullet havin a much higher BC.hovever theHMR carries less energy shortlyafter 100yards than the WMR does.but if you hit em right it will do the job. pretty much all the HMR's out there are great shooters,anschutz are high end rifles, cooper arms makes on to i beleive. and magnum research is about to release a semi auto with a graphite barrel