First, figure out what it is you have. From there, you might be able to get something from the markings.
no
British 303
the MAS
Actually there was no best sniper rifle during world war 2 because it was never tested. Different countries used different weapons.
Research it!
A lot.
It was called katusha.
M1 Carbine
Japan
German M98k
Wood and steel.
sidearm and a rifle.