I watched the guy on the show trying to rapid fire the bolt action rifle. He was not practiced with it and it may not have been oiled up and working as well as possible. I have practiced with bolt action rifles and I believe three shots in 2+ seconds are possible. OTOH there is not clear evidence there was a third shot was there? How many casings were found in the sniper nest?

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[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.

Clearly he wasn't a marine.

Marines have not had bolt action rifles as standard issue since the beginning of WWII.