struff's 20 yd info is for HV, I believe. I saw info like that on another site a few years ago. It gives you the approx 'arc' with 1.5" scope center above bbl.
I shoot 22LR-SV at 25, 50, 100, and 175yds, using a MOA 'tree' scope. 25 and 50 Zeroes are pretty close - maybe 1/2" higher on 50. If I plan to shoot 100 a while I take One shot at a target and 'measure' the MOA-diff between POA & POI. This usually runs about 6-8", and I will either 'clik-Up' for the diff OR just 'Hold" that diff on the reticle if it's just a few shots. Using a "Wind Rose" helps where I shoot since there's rarely a 'quiet' day and 22 SV is very wind sensitive, esp with head or tail winds.