Hello fellow members.. Shooting a winchester super x 3 26 inch barrel and rhino choke.. Gun sighted in at 20 yards. Poi/Poa adjusted but when I shoot at 30 pattern was a little low had to adjust pattern move sights higher is this normal .. I'm shooting nitro 3.5 2 7/16 of mega weight.. 4x6x7 pattern is very good but do not understand why pattern would be low at 30 when sighted in at 20.. Thanks for any help
