I believe the lighter .277 bullets are going to be the ticket with the 6.8. I have a box of Silver State 6.8 ammo that is loaded with the Sierra 110 Pro-Hunter. there are several bullet makers who offer 100 and 110 soft point bullets. I don't know about the a-max as a deer bullet, but know some have used them in .300 Whisper loads with good results. I have a magazine with 130 Grain BT loads, that Layne Simpson developed. I will probably try 130 SST Hornady bullets. I have e-mailed Nosler and inquired if they were going to produce a lighter .277 Ballistic Tip for the 6.8. They replied..probably not.
I have received data from Accurate Powder and the Hodgdon Annual manual has 6.8 loads. I will probably stick to the 100-110 weight bullets.