I rarely ever bore anything. Everything I do in a cue is streamlined to a few drill bits. As for the .381" pins, there's a cheat for that as well. A local guy was having issues with getting the pins in straight, so we went through his drill bits & found one that was around .383", if I recall. It was a metric bit but I don't remember the exact size or precisely how it measured in inches. Anyway, we used sandpaper to take that bit down to .381" and resharpened it. Now he drills a 5/16" hole then follows up with that .381" bit for the barrel, and his pins fit perfect every time. No boring or measuring or tinkering, just a drill bit.
It seems back yard mechanic ish because it is. I wasn't sure it would even work, but it was one of those drill bits in a set that never gets used. There wasn't anything to lose by trying. I wasn't surprised that it did work, but was surprised that worked so well. It took a job that normally would be several minutes & require accurate machining and made it nearly idiot proof. With the bit size matching the pin barrel, all he has to do is make sure the cue is chucked up on center and drill the hole. Exactly repeatable exact fit.