Find a reptile vet if you're vet isn't good with reptiles. If it's been feasting on pinkies, woodies etc and hasn't put on weight I'd be concerned about worms, parasites or another health issue stopping the weight from going on. Reptile vet is the way to go, probably some tests, not just visual examination.
My beardy just in the last two weeks has put on noticeable weight since coming out from Brumating.
Your temps seem spot on, is the beardy active at all?