If it is just for fun, then more tan likely the .22lr would be better..........but for precise target shooting I would say the 17hmr is a little better (but just a lil)...........but based on ammo price you can shoot 500 rounds for the same amount of money it cost for 50 rounds of 17hmr. Also, vthe 17hmr gun cost a slight bit more than the .22 based on marlin's gallery og guns price.........just my 2 cents, but i am looking into buying a new .22 and it seems to be ethe most economical, and can be VERY accurate out to maybe 100 yards (perfect for 50 IMO).