Should I send it in and let them see if any fine tuning is needed?
It is a pain to have to do that but maybe that is the thing to do. Might want to reconsider the Berger....they can be really finicky to develop a load for. That is the bullet I'm working with right now and so far "no joy". I would opt for a Sierra 85gr HPBT over 43.5 of H4831 or IMR 4831. Never had a 243 that would not shoot that load. Not really fast but a good way to see what your barrel does with it.