The distances are phenomenal
The side story that one sniper managed to shoot his 'oppo' ( the one trying to er shoot him ) through the sniper sight is true ( Vietnam )
and I think it is the final scene in a film catchily named Sniper
During WW2 the use of sniper scopes was not quite cricket
( and I think a sniper was at risk of being summarily shot if he were found with one ) Jude Law and Bob Hoskins star in a film 'Hollywood goes to Stalingrad ' That concerns a Russian sniper called Zaitsev I think.
Big thing in Germany during the Russian campaign. 1941-2.
My father had a lot of time to read the German accounts - [ by then he was an interpreter in a POW camp ] but for a long time went un-noticed
http://en.wikipedia.org/wiki/Vasily_Zaytsev