Like Lin, I use Devcon 2 ton epoxy. I rough my pin material with 120 grit sandpaper.
I also tapper one end of the pin so when inserting, it will help to center and align both
handle pieces on the tang. Just make sure to have glue in both handle pin holes, not just the first side.
I have piened a few pins before, but really there is no need if you rough and glue correctly.