Carbon Express makes some with larger diameter if that is what you want.
I prefer inserts to outserts myself. I don't like the profile of the arrow to have a 'bump' on the end that might interfere with the rest. Enough goes wrong while I'm hunting. I don't want to have something else to keep me from having confidence in my equipment. I don't know for sure if it would be a problem, but I'm not about to spend the $ to find out.

Got my first deer with a Carbon Express CX Hunter last Oct. They work just peachy, and I too have a 30.5 inch draw.
I shoot fingers with a flipper.
Carbon Express Arrows