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I'd drill the same size hole either side in the tenon and clean out the web between them with a needle file. It will be easier to keep the elongated hole level with this method me thinks. This is why I always prefer staples that are peened and low temp silver soldered in place and then wedges/keys used in place of pins. The wedge is narrowed in the middle where it passes through the staple for elongation clearance. I don't like to make dovetail cuts in barrels for tenons or rear sights as they weaken barrel stiffness.According to the Kibler build instructions, we are supposed to extend the tenon holes for the barrel pins so they are oblong so that the barrel can adjust due to the stock swelling or contracting due to weather conditions. So how is everyone accomplishing this? Do they make a metal cutting blade that will thread through the small drill hole? I have a coping saw with metal cutting blades, but they look way too big for what I need.
Thanks for the help
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