Drawboring is one of my favorite activities in the woodshop. There is an element of danger to it I guess. Once the holes are drilled (the tenon holes about 3/32 offset from the mortise holes) I line all my parts up. This time I cut the 3/8” pegs from a dowel instead of making my own and widdled one end on each peg down to about a 1/4”.
Once everything is ready (glue optional but I went ahead and used it this time) I glue up the tenons and assemble the joints.
Once the pegs are driven in and cut flush it looks like this.
And finally when drawboring goes wrong. My bit was not long enough to bore all the way through the leg so I left the pegs half blind. This particular peg was struck one too many times a little too hard and blew out the back of the leg. There are two pegs and glue in this joint so I think it is strong enough but still embarrasing.
-- Mike, Western New York