Further note about our chunk testing yesterday - it's certainly a different type of shooting, that's for sure.
I started off using my 'express-type" sights, round bead on the front, wide V at the back. After the heat came up in the barrel, I switched to narrow V with a silver blade. We were both using shaders so the sights looked great. Getting the proper 'spotter' target might be a hassle. With the bead front, the spotter target I supplied with the chuck targets was a good one, but not so good with a blade. A solid black circle or black square would be better for blade front sights - I found this out myself.
Part way through the shooting, I changed sights, putting on the black and narrow V notch sights. My shooting immediatly went down hill - horrible pattern-type groups. I changed the target to a round black but still couldn't get groups I as happy with - they wer more like patterns.
I switched the sights back to the bead and wide V and then started shooting well again, but couldn't hold better than an inch group for 6 or 7 shots. I guess that will have to do. The ringed 'spotter' works well as the bead covers the inner black rings, leaving a single ring of black halo'd around the bead. This seems to work for me the best.
The trouble I ad with the blade, was getting the correct amount of light between the bull and the front sight. Coupled with this, I was having trouble agan with too much fuzziness around the read V notch. It's Plenty wide enough for lots of light, but I still couldn't see it very well. My eye-sight sees the Express-type sights much better.