I agree, really depends on how well you shoot, how well you know your gun and if you have a range finder or not. I have heard of people on rimfire central making shots out to 300 yards.

I say 200 is reasonable, if you hit it in the head or base of the neck I'm sure it will go down.

Let me know how high the center of your scope is from the center of your bore and what type of rifle you shoot and I can do some ballistics calculations for you that will give you the best sight in for what range you want to shoot. If you sight them in for 100-110 yards they shoot pretty flat out to about 130 yards.

Paul