Looks like I'll finally get a chance to test this motor this Saturday the 19th at the FAR site. Thanks for the suggestion Ben.
Here's the starter grain. Easily ignitable, fast burning KN/SU/RIO. For this test a standard BP igniter strung through the nozzle will be used to initiate ignition since the port in the bulkhead will be used to measure chamber pressure. This is approximately 15 grams of propellant.