As for me I would choose the Barrett 416 over the CheyTac 408 hands down!
You might want to do some research in that area of ballistics and other areas of the weapon systems.
The book the movie was based on (Point of Impact)has lots of information on his background and training. Very good character development rivaling Clancy's creation John Kelly/Clark in Without Remorse.
I have not varified the whole list but some I have.
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Lo there do I see my Father...Lo there do I see my mother and my brothers and sisters...Lo there do I see the line of my peoples back to the begaining...Tho they do call to me...They bid me come take my place among them in the Halls of Valhalla...Where the brave may live forever
Long distance..The next best thing to being there, if you are anywhere between 100-700 yards my Howa and I own you and will choose your time of death. opaww