etisII40, I understand what you are hinting around at and the bottom line is that the weapons used by the snipers revolve around 3 weapons and only 4 calibers, EXCEPT, for those who get to play with their own choices. And those are the M110 (ar style) in 7.62, the m107 Barrett in 50bmg, and the "newer" rifles in .300 win and .338 lm. The most passed around long ranger is the 50 by far and thus has had the enjoyment of substantial more field work than any other system or caliber suited for long pokes.
That all being said, they aren't accuracy kings by any means but they get the job done and then some. However, there are a handful of cartridges out there that are inherently more accurate and in smaller platforms, yet still have the same or better range ability. Have to remember, the big 50 is just a super sized version of the 30.06 in design.
I am in no way slamming the big girl, heck I am trying to figure which platform to get with that cartridge for my own collection but just making a point.
As far as the shot goes..... if it really did happen..... It doesn't matter if that thing was heard coming in. A bullet that heavy is gonna hurt no matter the velocity!