Keeping your head straight up wouldn't do it. Leaning your head 45 degrees to coincide with the angle of the cant wouldn't do it. Your peep/pinline-of-sightare on a completely different line than the launch angle of the arrow and the two lines do not intersect. The arrow will hit far to theleft when the bow is canted 45 degrees to the right and you have the sight pin on the target. What you claim you did is physically impossible.

Now, if you'd said you just aimed down the arrow and shot barebow, then yes. It's perfectly possible to shoot that kind of group at 25 yards with the bow canted 45 degrees.I do it all the time.

But for what you say you did, I have to call BS.