I use 2-part epoxy for all the points I install, field points as well as broadheads.
Nothing is hot and the cure takes a little while so it's easy to adjust the point to be sure it's on straight. Some people balk at epoxy saying that it's permanent and you'll never get the point off... false. A simple application of heat, just like you'd use with the traditional hot melt glue, will remove an epoxied head.
Regardless of what glue you use, be sure to completely clean the inside of the head before gluing. The oil or grease left over from manufacturing will foil any glue you use.
Guy
Have you tried coating the metal to wood joint with some kind of sealer? Maybe wipe on poly or something.... just a thought. ;)
---Ford---
I actually do this when I use epoxy to glue tips. I apply enough epoxy that some squeezes out when I push the tip on. I wipe this squeeze-out material off with a paper towel and at the same time I wipe it around the shaft so it coats any bare wood from the tip tapering.
Guy