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You'll like this ... according the ballistics graphs that I've downloaded from rimfirecentral.com (and you can do that too) you can shoot to / at about exactly the same point. I believe that the same POI is for 20 yd and 56 yd.
Assuming that you're using the more-commonly-available high-speed (1260 fps) ammunition ...
Get the graph. Best use ever of my expensive $40 Inkjet colour cartridge
Thank you all. So it will be close enough if I use high-speed .22 ammo. That's good enough for me as I will shoot in standing position anyway (prefer this way).
No! If you have your sights set to hit where you are aiming at 20 yds, then at a target 50 yds from you aim 1/2" higher than where you want to hit.
If you are shooting from a standing position you might as well aim right on in a hunting situation for anywhere from 20 to 50 yds. because you cannot hold steady enough to worry about the slight difference from 20 to 50.