I will also add that most of the Military Sniper Rifles are top of the range which helps.
Here in Australia the ADF mostly use Accuracy International AW's (7.62 Nato, 50 BMG) that are made under licence in Australia but we also have Knights Armorments SR25 (7.62 Nato), Blaser 93 Tac 2 (338 LM) and I think we have or had a few Barrets M82 (50 BMG) to test out.
All are a lot better for sniping than your average Ruger M77 or Remington 700