I regularly take shots around 100-120yds but not often more than that,as I find there is no need to if you are quiet. As to the effective range of the gun, this is not really a factor, as over about 150yds working out the bullet drop can cause a problem. I do know a guy who has taken a rabbit at over 200yds with a .22lr, but he is the exception to the rule. The best thing to do is zero at 60yds, and work out your hold-over at 100. Then just get some practice in. Best of luck.