Just to make sure everyone is on the same page. I thought I would upload this excerpt from "How to run a match". It is used as a training tool from IDPA HQ.
I have seen some SO's stop, bend over, get 6 inches away and start poking one of two clearly visible holes with a pen or their finger. Scoring needs to be done at an easy scoring pace. Once you pause and stop, look at the back of a target, that clearly has the required number of shots, it takes a little away from the spirit if the rule. The better score goes to the shooter. That's the rules whether you like it or not. Competitors that are taping need to understand this rule also. There is no need to call an SO back to a target because after your examination, he made a bad call and you are going to prove that the shot is not on the perf.
When an SO examines a target it is to determine if that single looking hole is in fact a double. If you see any elongation at all, it is a double. If as an SO you say to yourself it may be a double. Then the shot goes to the shooter.
Scoring is not an exact science in IDPA. It is subjective to the SO's initial determination of the shot. I hope this post will attempt to balance out the "I don't care" Safety officers and the "scoring Nazi's"
Watch this Video from IDPA HQ. This should help you better understand where IDPA scoring is coming from.
In ICORE we will get the overlay out and determine exactly where that hole is. Also if you have never seen an overlay come see me. The holes are much larger in the overlay than that caliber hole appears on the target.