smokepole,
How 'bout if five shots on a 400 yard target, each with one grain more than the previous shot, make a group 1" high and 2 5/8" wide? Which one is at the top of the node and the other at the bottom of the node?
That's a tough one, but I like to explain it like this:
1) Find the node and designate the bullet holes that are included in it.
2) Find the bullet hole within the node that is above all the others. It's at the top of the node.
Now, here's where it get's tricky again:
3) And vice-versa.
