My Dad's bow is a hoyt cam and 1/2 50-60#. He's been having trouble with grouping. Some good some not so good. I suspected it might be the shooter not the bow that was the issue. He is kinda new to Archery.

Well he did have a few issues with his sight. First of all hehad some junk sight on it and it was always coming loose. I put my old Copper John on it and I am getting good results.
However it appears to me that the arrow kicks virtually sideways halfway to the target (20 Yards) and then straightens out and hits dead square. So I figured if this was indeed happening, that at 10 yards the arrow would not hit square. But I was wrong, and didn't notice the arrow kicking at this yardage.
Perhaps it was just the fact that I was shooting outdoorson a quite windy day...I dunno. What else would cause the kick that i'm seeing, being that it still hits accurately?