Setting up a dummy round for smith to throat to. Plan on shooting 205 Elite Hunters and maybe some of the hybrids. I'm sitting about a 3.1" OAL. Have the bottom of bearing surface just above neck junction. Seem right??
It looks right for avoiding the donut issue.
If you are single feeding, length isn't a constraint.
If it has to feed, then the other parts must coordinate.
Does your action and magazine support the extra length?
I seat .005"-.010" above the shoulder/neck juncture, this avoids the pressure ring, or donut as some say.
You will need 3 dummy rounds for your GS to measure accurately.