You need the services of a good gunsmith
http://www.milsurps.com/showthread.php?t=4025
100-5000 USD depending on specifics
yes there is a springfield .303 i have one from 1942 its a springfield rifle with a .303 british barrell
No, it is not. It is roughly comparable with the Springfield 30-06 or the British Lee Enfield .303
number5 mark 1 enfield 303 british jungle carbine
yes it is just a difreint mesherment 303 is british and 7.7 is jap.
No such rifle. The Lee Enfield was made in caliber .303 British, not .308. The closest thing would be the Ishapore 2A or 2A1 rifle, made in caliber 7.62 NATO. While similar the .308 Winchester, it is not the same, and .308 should not be fired in a 7.62 NATO rifle. The Lee Enfield "sniper" rifle in .303, if original and complete (and not an aftermarket conversion) may sell for around $1500, depending on condition and accesories. There are many fakes on the market- be sure of what you are buying.
British 303
Combination of serial number and features.
50-300 or so
No, a 303 is a rimmed cartridge, the 308 is rimless.
7.7x56R, more commonly sold as the .303 British.