These sites may help some folks.Parallax links & scope info:1. How to Eliminate Parallax in a Riflescope (gunsandammo.com) https://www.gunsandammo.com/editorial/how-to-eliminate-parallax-riflescope/3762732. Parallax Adjustment for Scopes: Complete Beginner’s Guide (shootingmystery.com)https://shootingmystery.com/parallax-adjustment/3. Parallax Adjustment – 2021 Guide on Understanding and Correcting Parallax - Gun Mannhttps://www.gunmann.com/scopes/parallax-adjustment/4. RimfireCentral.com Forums - View Single Post - Derivation of Parallax Equationhttps://www.rimfirecentral.com/forums/showpost.php?p=21509995. The Scope, Sights, & Mounts Super-Sticky (questions? try here!) - RimfireCentral.com Forumshttps://www.rimfirecentral.com/forums/showthread.php?t=4961416. Rifle Scope Objective Lens Diameter Guide: Choose The Best Size (targettamers.com)https://www.targettamers.com/guides/rifle-scope-objective-lens-diameter/