Go into the camera settings and check what resolution it is set to, seems to me that your resolution may be too low which will render the holes as having jagged edges and this will cause problems. Choose the highest setting possible.
Atb
Chris
BSA Ultra Multi .22 ( Falcon Merlin 10x42T, `Tweaky` reg, HW mod, Cobra Merlin+Dipol L3 ), Skan M32 .177 (3-12x44 mini SWAT), Alros Trailsman .177 (Simmons WTC 1.5-5x20 , `Tweaky` reg ), Steyr Evo 10e and a Daystate Pulsar. 177..