I've found that if you start with hard brittle pitch your pitch glue isn't sticky when cool. If you start with sticky pitch it is sticky when cool.
I start with hard, brittle pitch, add bees wax to make it less brittle and add charcoal to add body. You can substitute animal fat to reduce brittleness and also other materials like dried rabbit or deer dung, saw dust, finely chopped straw and other materials to add body.
I never had a specific recipe but just put in the additives as I see fit for the consistency I need.