Calibres allowed to be imported by Arms Dealers:
Ø Import of Ammunition by Licensed Arms Dealers
As per Para 2.34 of Chapter 2 governing General Provisions Regarding Exports and Imports of Handbook of Procedures Vol. I, 2009-14,-
Import of following types of ammunition are allowed against an Authorisation by licensed arms dealers subject to conditions as may be specified:
(i) Shotgun Cartridges 28 bore;
(ii) Revolver Cartridges of .450, .455 and .45 bores;
(iii) Pistol Cartridges of .25, .30 Mauser, .450 and .45 bores;
(iv) Rifle Cartridges of 6.5 mm, .22 savage, .22 Hornet, 300 Sherwood, 32/40, .256, .275, .280, 7m/m Mauser, 7m/m Man Schoener, 9m/m Mauser, 9m/m Man Schoener, 8×57, 8×57S, 9.3 m/m, 9.5 m/m, .375 Magnum, .405, .30.06, .270, .30/30 Winch, .318, .33 Winch, .275 Mag., .350 Mag., 400/350, .369 Purdey, .450/400, .470, .32 Win, .458 Win, .380 Rook, .220 Swift and .44 Win. Bores.
Link:
http://www.customsmumbaiairport.gov.in/ ... ?LinkID=67
All ammo you will find will be a.) old or b.) illegally being sold by renowned shots.
Choose your poison.