I have read or watched every tutorial I can find on the Android Range Buddy app. I cannot get accurate measurements no matter what I do. Sometimes they are very close but often they are significantly over 1/10 of an inch too big or too small. Not a problem for a gun that shoots larger groups, but for me the difference between .3 and .4 is significant. Should I give up and stick with a dial caliper for accurate group measurements?

Here is how I measure a group.


Set the bullet diameter in settings
Before taking a photo of the group, align a 1" square grid on the target with the green grid on the screen
Set the spacing of the grid marks on the target using the "crossed pencils" button
Take the photo
Carefully center the cross hair on each bullet hole
Hit the yellow menu on the left bottom list to show the results.

Is there something I am missing or is +/- 0.10 the best I can hope for?