In the "early" days (and given my age, I can say that), Leonard Brownell and others believed that the next step you would take would be a full-length bed - action AND barrel channel. In the first AGRAGLAS instructions, that was what was recommended and Bishop's and [bleep]'s offered/recommended it in their finished custom stocks. In most instances, it DID improve over the previous status quo. Not saying that is the ultimate way to go as the norm for me is to free-float my rifles; however, the take-away is that stable pressure can temper a barrel's harmonics and shrink groups.
