Call State Police and ask. (I'll assume SP handles the NICS check... they do in VA)
I've had this problem with my transfers and purchases. I put down my SSN, I have a 03FFL and even use my VA CHP as secondary ID. Yet I always get Delayed status.
I finally called VA SP on Tuesday and asked the Firearms Div supervisor if she could tell me why this was happening.
Turns out someone else has my first name, last name and a similar date of birth... and a felony record. So despite providing the other measures to distinguish me from him (SSN, 03FFL, CHP, different middle name)... I'm pretty much guaranteed to always get Delayed status.
At least I know now, to fill out the paperwork and go for a drive somewhere while waiting for the all-clear.
Make a call. At the very least, it will stop you from wondering why.
I'll be picking up two revolvers on Saturday... already planning out how to spend the 2-3 hours in-between handing over my 4473 and actually receiving them.