Dr. Tim,I like it, so much that I wish you had gone even further with some more faux Higgins touches carved in, but I guess you went as far a the utilitarian concept would allow!
Be careful drilling into hole like a rifle bore, The drill bit can snag on that radius and then all kinds of fun occurs trying to get it out,especially if it breaks off below the outer surface of the barrel. The way I manage this is to have no more of the drill than is actually needed to get thru the wall of the barrel,wall thickness plus 1/16" will work in this case. Use a new drill bit as well,preferably one that is TiN coated.Use no more pressure than is really needed to make the bit advance into the barrel.Good luck. One other thing,what is a Long Hammock barrel??Bob Roller