Blackmtfarrier

I know this doesn't answer your question but just for something to chew on as to whether you actually need a 'tomahawk' drift. Some good advice that I've used was given by Joe Szilaski at the 07 ABS hammer-in in Vermont, that if you're making a tomahawk for use and not for the art of it, drift the hole square or circular and not tear drop shaped like the 'typical' tomahawk drift, because it makes re-handling it in the field easy when it's very hard to shape a branch to a tear drop when in the woods

Most, if not all 17th, 18th and 19th century "tomahawks" or trade axes were drifted for a round tapered handle. this was done so the natives could just cut a straight limb and fit it without much work. See this website http://furtradetomahawks.tripod.com. so if you want to be more "traditional" you would use a round drift not a teardrop shaped drift.