skoutfitter,
First of all let me say I'm glad you found your way here. You E-mail sounded just like mine. I don't own a .308 Survivor, but I understand they have very deep throats, just like my Ultra .223. It doesn't seem to hurt the performance of the .223, so hopefully you'll find it the same way. I have loaded for the .308 in the past, and found the 165, and 168 gr. Sierra bullets to be very accurate. I had used IMR4064 for those loads, and was able to get groups the size of a quarter at 200 yards. Keep us posted with your results, and glad to see you here.
Don