I also have to go with Wayne on this. I can set up with or without the action attached and be done in 15 or 20 minutes thru the headstock with a spyder and a four jaw and two indicators. I usually cut a 90 degree recessed 60 or 70 thousands. The reamers made for cutting crowns have a changeable live pilot just like a chamber reamers so there is no reason to damage the bore. That might be an option for the lathe-less. Kenny
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sicero
I pride myself in being able to make decisions with little information.
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