For a mixture of longrange HTI and anti-persional, I'd go with the .408 chey-tac. It is capable of 15" at 2000 yds, that is mind you in the hands of a very capable shooter. I also understand that, because of greater velocity, has more KE than the BMG while being 33% lighter. It is super sonic past 3000 yards. It would be perfect for a sniper who has the posibility of taking out people, even behind hatd walls, and tanks/APC's or other hard targets. The .338 Lapua, while ballistically superior to the .308, isn't enough of a HTI round to make it worth while.