Interesting results Mark. Did you notice any change in where they shot, i.e. same point of impact when cold out? Some of those velocity jumps are significant, I would not be surprised if POI changed somewhat.
I didn't shoot for groups. My range is only accessible by foot for most of the winter and it's 1/4 mile haul in. So I just fired these offhand at a snowbank. I am sure group size can vary in hot to cold
