Last year I purchased the .20 H&R Pardner and bought the USH rifled barrel for it. I am having a difficult time achieving a good group at 100yards unlike other .20 gauge USH owners. The best I can do is a 1-2 group at 50 yards with Hastings slugs. I tried Hornadys but I had horrible groups at 50 yards, so I switched to the Hastings brand. I am 2 inches high at 50 yards and when I move out to 100 yards my shots drop 4-5 inches. Do you think my shooting technic is causing my poor group at 100 yards? Are any of you .20 gauge USH owners having a similar problem? I bought a box of 3 in Hastings to see if they make a difference. Thanks in advanced.