never really thought of parrallax alot before untill today, i would just focus the scope and shoot. Today a wierd thing happend, after a morning of shooting switching between 3,4 and 600 yards, i went back to the 600 yard line and forgot to focus my scope and left it on 300. i missed the 6" gong by about 1.5 feet 2 times in a row in different places. then realized my parralax was adjusted for 300 not 6. then i properly focused it and hit it 5 times in row. could the focus being off really make me miss by that far?