Helped sight in a friend's smoothbore slug gun today. Two of the shots at 75 yards with Federal Tru-Balls left smaller, round holes next to the slug holes in the target (one touching the slug hole, the other about an inch away). It seems that it had to be the ball traveling separately from the slug that caused the holes. Should this surprise me? (The slug holes were perfectly shaped, with no sign of yawing,) The slugs shot accurately, but I was puzzled by the two holes.
