I am not sure what you mean, I have one, what do you mean shot it high to low? Different ammo? Or sight pic?
Been playing with mine lately, and it is very reliable, unless you have some of the lowest bulk grade ammo, sometimes Fed champion fails one, either a misfire (with solid hit) or sometimes that ammo does not impulse the slide hard enough to eject in my Astra Constable.
But, using the bulk 550 pack of copper coated 36 gr hp's it has been doing great. A great 'fun' gun, for plinking. Very light and compact for a 'kit type' gun, never know it's there. I have killed lots of snakes with lead bullets, not shot, out of 22 pistols. Don't see the need, just head shoot them, esp. when close.