What is the effective range of this gun for both target practice and small game?

i have that gun....and i love it...farthest i killed was 75yards.....squirrel....perfect head shot.....ive shot targets accurately at 100yards....and i can hold groups the size of a dime at 50ft(normal indoor range for target shooting) and thats with a crappy 20$ tasco 4x on it with any old ammo i find.....i truely love that gun...and its pretty cheap too...and doesnt look like a cheesy gun.....ive shot 1000s of rounds through mine no joke...i dropped 2 squirrels from the same tree at the same time with that gun standing free hand....3 shots....first shot i wounded the only one i seen...then seen another one close to the nest so i put one in the ear of that one then one through the eye of the wounded one....both landed withing 2 feet of eachother.....i love that 22.....and it loves me back...lol.....ive made many many good shots with that gun......