Linc
Sooner or later, you get into the accuracy of being able to measure a hole poked into a piece of paper by a bullet.
At last years Texas State 10 shot Unlimited, I shot a .163 in match one. It looked smaller, so I put $5 dollars up, and sure enough, it came back a .143. I was quite pleased.
A few days later, I was looking over my targets, and took a real close look at that group. At first glance, it looked as if the "black of the bullet" was extending up into the edge of the mothball. But, under a magnifyer, I could plainly see it wasn't. I measured that group ever way I could, and could get no more than .335 total spread anywhere. That is a .095, or there abouts.
I have the target hanging in my office, because I truly believe I shot a 10 shot 'zero". What I should have done at the match was put another $5 up and request the referress to take a look. But, in my pleasure of getting it knocked down to .143, I just didn't. As an added note, in Match Three, Mike Conry shot a range measured .096. Keep in mind, that is only about the 3d or 4th 10-shot "zero" shot in Registered Competition since the conception of time. Mike also won the yardage. I was second.
So, you see, we are not only at the mercy of our ability to actually shoot a ".000" group, we are also at the mercy of acsertaining the true size of the group as it appears on the target.
Where is that formica when we need it
.........jackie