Bevel/Emboss Cauing Pixelated Edges

I'm probably using the wrong terminology for all this so apologies in advance. 

I am using the Inner Bevel with Chisel Hard technique, and the gloss contour is causing the center of the shape (where it breaks from lighter gold to darker gold) to become very jagged and pixelated, noticeable even when zoomed out. I would use the Smooth technique but it doesn't have the look I'm going for.

The layer being embossed is actually a shape, so it's a vector and therefore not a pixel-based image. So I don't think pixel quality is the issue. I attcahed a screenshot of the shape up close to show the jaggedness as well as my bevel settings. Any help is much appreciated.