blowgun

I bought a pneu-dart blowgun awhile back. It came with no instructions. It is pretty simple to operate and stuff, but I have questions about the darts. I sent them an email, but no return contact. I have a syringe to fill the darts, but how much do I put in. Say it calls for 2 CC's of something...

I bought a nice gun for darting my deer but then after attending one of those seminars on darting wildlife decided I'd probably never use it. It still sits in the case unused after 4 or 5 years. Now I'm looking for a blow gun as I have my deer corralled for holding and treatment and the gun...