Quite a nice group Jason; doesn't sounds like it was a comfortable day to be shooting!
Am glad to see you putting a Bingo marker to a civilized use ;-)
When shooting in wind, you can oftentimes get a good proxy for the no-wind group's size by just measuring the vertical size of the group. This is because wind tends to affect the left-right position of shots much more strongly than their vertical position (usually). My eyeball SWAG says that you have a ~5/8 MOA (vert.) group there. Given comfortable conditions, I expect you would likely shoot sub-MOA 5-shot groups.
In my own notebooks for my rifles, for every match that I fire I record a group size like "1.2H x 2.3W", meaning that my group was 1.2 minutes high, and 2.3 minutes wide (for me shooting iron sights off the elbows at 300-600 yards, this sort of group would be a typical "good" shoot for me; with an F-Class rifle something like "0.6H x 1.6W" might be a comparable performance). Our matches are typically 2 convertible sighters plus 10 or 15 shots on score, so these would be groups of 10-17 shots.
In this manner, a group's elevation (height) tells you how well your rifle, ammo and you as a shooter (all combined together) are performing. In no-wind conditions the group's width ought to be pretty much the same, so the extent to which a shot-in-the-wind group's width exceeds its height will give you a good idea of the variability of the wind during that relay.