The experts will be no better, they'll just be more definitive making a call. Everyone here has a done a good, careful job. It can be hard to tell the difference sometimes. I've been checked out on dozens of jawbones by my wildlife biologist before he would allow me to do them solo. I had to go over 2 years worth of harvested jawbones.

This buck is probably 2.5, but the pictures hide some of the detail on the dentine. In addition, it would be nice to feel the cusp on the last molar to feel for concavity vs. sharpness.

Another great tool available on the QDMA online store and elsewhere is at http://www.deeragingtool.com

This tool, in addition to the charts you mentioned can really help.