Huben 22 GK1, is this keyholing?

[bubbahotep]

400 fps with CPHP, 5m away and target is 1 meter above shooting position. Not sure if keyholing or hanging chad because of angle. Stairwell is only place to shoot without windows nearby.

 

[imtrigerhapy]

400 fps with CPHP, 5m away and target is 1 meter above shooting position. Not sure if keyholing or hanging chad because of angle. Stairwell is only place to shoot without windows nearby.

View attachment 580192

Try to match the target angle with the stairs angle and then try. So the pellet flight is as close to straight on

 

[beerthief]

Looks like ripping/ tearing to me . like post 2 said place target flat to your aiming and flight of pellet ( so pellet enters square to the target )