Trouble Spraying High Build Primer

I'm using SPI turbo High Build primer. I'm shooting it with the recommended 1.8 and higher tip. The gun I'm using is a harborfreight purple gun with a bigger tip and the trouble that I'm having is I cannot get it to flow like the epoxy did. I have the fan wide open and I have the fluid wide open and the primer comes out of the gun and immediately orange peels. It starts to flow out real nice just before the cup empties, so I'm not sure what's going on. I do know that that primer is super thick.

I am shooting it in reduced as the tech sheet says reducing it for the final blocking.

Any thoughts?