Ishapore 2A/2A1Main article: Rifle 7.62mm 2A1
Ishapore 2A1.At some point just after the Sino-Indian War of 1962, the Ishapore Rifle Factory in India began producing a new type of rifle known as the Rifle 7.62 mm 2A, which was based on the SMLE Mk III* and was slightly redesigned to use the 7.62 mm NATO round. Externally the new rifle is very similar to the classic Mk III*, with the exception of the front sight protectors and magazine, which is more "square" than the SMLE magazine, and usually carries twelve rounds instead of ten, although a number of 2A1s have been noted with 10-round magazines.
Ishapore 2A and Ishapore 2A1 receivers are made with improved (EN) steel (to handle the increased pressures of the 7.62 mm NATO round) and the extractor is redesigned to suit the rimless cartridge. From 1965–1975 (when production is believed to have been discontinued), the sight ranging graduations were changed from 2000 to 800, and the rifle re-designated Rifle 7.62 mm 2A1. The original 2,000 yards (1,800 m) rear sight arm was found to be suitable for the ballistics of the 7.62x51 NATO which is around 10% more powerful which equates to a flatter trajectory than that of the .303 British MkVII ammunition, so it was a simple matter to think of the '2000' as representing metres rather than yards. It was then decided that the limit of the effective range was a more realistic proposition at 800 m.
The Ishapore 2A and 2A1 rifles are often incorrectly described as ".308 conversions". The 2A/2A1 rifles are not conversions of .303 calibre SMLE Mk III* rifles. Rather, they are newly manufactured firearms and are not technically chambered for commercial .308 Winchester ammunition. However, many 2A/2A1 owners shoot such ammunition in their rifles with no problems, although it should be noted that some factory loaded .308 Winchester cartridges may appear to generate higher pressures than 7.62 mm NATO, even though the rounds are otherwise interchangeable, however this is due to the different systems of pressure measurement used for NATO and commercial cartridges. See the Wikipedia article on the Ishapore 2A1 rifle for further details.
Commercial ammunition tends to run a round 55,000 psi, some lots of military ammunition can run around 60,000 psi. The military brass is heavier than commercial brass.
Numerich Gun Parts
part # 376330
listed under SMLE Ishapore #2
Enfield 308 10Rd Gun Magazine