The .303 British and .303 Savage are not the same. Only purchase the caliber that is printed on the barrel.
The cartridge is sometimes called the .303 Enfield or .303 British (or even 7.7×56mmR). Do not attempt to use other ammunition.
Do a search for: British No.1 MkIII, No.4 Mk1, No. 5 Jungle carbine or British Enfield these are the three major models of the .303 British rifles.
If you mean CARTRIDGES for a .303 Enfield rifle, also known as .303 British, depends on which cartridge, and where you are. In Virginia in the US, civilian hunting ammo may retail for $35/ 20 rounds. Careful shopping for surplus ammo may be less.
Assuming you mean a rifle such as the SMLE, the cartridge used in the .303 Enfield, also called .303 British. See the link below for information on this ammo. However, if you are not certain (some military surplus rifles were rebarreled into other calibers) have a gunsmith take a look at it.
If it's a W-W Super, .303 Brittish it's not worth much. This is a common round. W-W stands for Winchester-Western (brand name of the ammo manufacturer), SUPER is a line of ammo they offer, and .303 Brittish is the caliber of the bullet. A box of 20 rounds can be bought for around $10.
You will have to search for books on the unit.
Catalogs, gun shops, sporting goods stores, etc..
number5 mark 1 enfield 303 british jungle carbine
yes there is a springfield .303 i have one from 1942 its a springfield rifle with a .303 british barrell
Try e-gunparts.com
yes it is just a difreint mesherment 303 is british and 7.7 is jap.