Hey Josh. Set happens.
Hickory particularly will take a boatload of set when it is strung and shot in higher humidity. Fact is, most areas where hickory grows is a poor place to shoot with it. Now bring that same hickory stave up here to South Dakota, particularly here in the Black Hills and it will make a screaming fast bow that is virtually immune to set, chrysals, or failure.
Your best bet is to start reading up on heat treating. Here in the Bows section there are dozens of threads on heat treating. Type that into the search engine on this board and you will be overwhelmed. There's great info, but you have your work cut out to go thru all of it!
Post some pics along with the bow statistics, we'd all like to see what we can do to help.