These threads might help, in the fourth thread there is an image with sniper test results in it.
http://www.battlefront.com/community/showthread.php?t=49076&highlight=sniper
http://www.battlefront.com/community/showthread.php?t=41895&highlight=sniper
http://www.battlefront.com/community/showthread.php?t=4595&highlight=sniper
http://www.theblitz.org/message_boards/showthread.php?tid=39828
As I recall, sniper won't open fire inside of 100 meter with their rifle, but will open fire with their pistol at very close range. Occasionaly to great effect.