....."minimal on deer"...... Not in my opinion. Especially with some of the better bullets to come along in the last 10-15 years.
When guiding in Maine,I had sports take down moose(one,a 775lb cow at 40yds)and black bear(biggest was a 245lb boar at 30yds)with the so-so bullets offered back then. Pre hunt,I would always make sure they could shoot the gun well,and brief them as to shot placement and max range.
With the excellent .244" bullets offered nowadays,I would think that the necked down .308 will handle any white tail very well. Personally,I would take a step up to the 7mm-08 though. ---pruhdlr