Go with a ARP (AR Performance) barrel. Great barrels, great price and as mentioned above mine shoot sub MOA with factory Hornady 120gr SST loads. The SST performs well on deer.
ARP 16”, Scout profile (5R). Factory 120gr Hornady SST. Can’t recall if it was 267 yards or 276 yards. Either way it was a bang! Flop!
Factory Hornady 120gr SST (200 yards).
Factory SSA 110gr Accubond (200 yards).