Glock, you've got the basic idea already; what you DON'T want to do is start at 20 yards unless you like losing your arrows.
Originally Posted by CDR_Glock
Mount your scope
shoot at 5 yards and adjust
shoot at 10 yards and adjust
shoot at 15 yards and adjust
decide where you want your 1st aimpoint [crosshair] to be [usually 20-30 yards]
shoot at 20 yards and adjust. If this will be your 1st aimpoint, continue to zero; if not, zero where you like.
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Middix 350 hybrid Frankenbow
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Wham-O Powermaster [retired]
Jack Pine Flemish twist crossbow strings, "The Rembrandt of crossbow strings."