I'm gonna sand my barrel channel some and separate my straightest rounds and see what I can do with them.
I have mentioned many times, in various places, about testing free-floating by inserting a thin spacer between the front end of the receiver and the stock, just behind the recoil lug. A thin plastic bread-bag "tie" makes a perfect shim for such a test--and unlike gradually sanding the barrel channel usually REALLY floats the barrel. Have seen group diameter cut at least in half with this simple trick, which also isn't permanent, so doesn't harm the "original condition" of older rifles.
But whatever....
