Here's the problem. With barrel in a vise, when I get the headspace set and tighten the barrel nut, the action turns-changing = increasing headspace. Hence, I must fiddle about with and hold the headspace and nut. What is needed is a tool to hold the action from turning when tightening the nut. I've been using the BIG screwdriver. A spanner with a pin to fit in the gas escape hole in the action would do the trick. Does anyone make such a spanner? Why wouldn't such a spanner be superior to current action wrenches?
joe b.