Group Measuring Help

[AvsFan]

Gent's,

Will someone please assist me in measuring these groups? I've seen other posts that looks like some type of software that calculates the group size. I've posted these before, however, I'm really wanting to know exactly how big this spread is...thanks in advance!

Distance - 155 yards
Caliber - 30 (300 Win Mag)
Rounds per string - 5

1st String -

2nd String -

3rd String -

4th String -

 

[billyburl2]

Measure from the outside of the furthest two holes, and then subtract the bullet diameter.

 

[Weaselthis]

Might try this:On Target Features