Perhaps this is old news (its new to me), or perhaps there are better programs out there than this, but I think this is totally awesome dude!!

Just read the quick start guide and/or watch the video.
http://www.ontargetshooting.com/index.html

I like that thing. I was shooting my custom 10/22 today from 75 yards. It was windy as hell and the groups were not much to write home about, but I did manage to put two or three into the same ragged hole out of ten. I'd like to see how I did in MOA for those sets...

I just downloaded the FREE software. I have to try this. thanks rc

I really like it. It makes it so much easier to calculate Mean Radius, which I believe is a better description of accuracy than maximum spread.