I mentioned in the silhouette thread that when I was shooting the other sighting in targets it turned out my scope was bouncing all over the place.
After we screwed the damn thing down (I have half a mind to loc-tite it) I got much better groups at 60yards. I don't have any markings to indicate elevation presets, so changes in range were by guess and by golly.
Much better. Now I need an after market trigger and a better scope.