I just bought the DPMS 308B as well.
I'm shooting 44gr of Varget, 168gr Berger VLD's , Remington brass and CCI250 primers. No pressure signs at all in my rifle.
I'm getting 2660fps with the 18" barrel and it groups right at 1/2" @ 100yards while cleaning each round during break in.
Seat the bullets out as far as you mag will allow.