Several of our pins come with a centering/alignment barrel and a glue-relief groove cut in the barrel.
Bob Dzuricky of http://DZCues.com has a some great videos of installing these self-centering pins.
Live Tooling the threads
Live tooling the threads, hole, and chamfer
Live tooling accuracy
*Thanks to Bob Dzuricky of http://dzcues.com for his photos of the 3/8-10 flat bottom joint pin and videos of installing the pins with the self-centering alignment barrels.