New 5.56x30mm Cartridge from India
The Indian Army has introduced a new Modern Sub-Machinegun Carbine (MSMC) that shoots an interesting new round, a shortened version of the 5.56×45 (.223 Remington). According to The Firearm Blog, “The [MSMC] chambers a round developed in India called the 5.56×30mm. This round is sometimes referred to as the ‘5.56×30mm INSAS’ after the first gun to chambered the round, the INSAS Carbine.”
This is an interesting cartridge, reminiscent of the 5.56×30 MARS cartridge originally developed by COLT for its Mini Assault Rifle System (MARS) project (see below). The MARS gun never went into full production, and the 5.56×30 cartridge remained an orphan. But it was an interesting cartridge. As designed, using just 16.8 grains of commercial ball powder, Colt’s 5.56×30 cartridge could launch a 55gr FMJ bullet at 2600 fps.
We are intrigued by the new Indian 5.56x30mm cartridge because it would seem very well-suited for varminting, either in .22-caliber form, or necked down to .20 caliber or even .17 caliber. We already have a similar cartridge, of course, the 221 Fireball, but right now there is only one manufacturer of 17 and 221 Fireball brass, namely Remington.
If the Indian 5.56x30mm cartridge is produced in large quantities, perhaps we could see budget-priced 5.56x30mm brass exported for sale in the American market. That would be a boon for high-volume varminters. Also, if the Indian 5.56x30mm is standardized internationally, perhaps one of the European brass manufacturers (Lapua, Norma, RUAG, Wolf?) would consider producing it as an alternative to the 221 Fireball. We can only wish that a 20-cal or 17-cal version of the Indian 5.56x30mm cartridge might be produced some day as inexpensive factory ammo. Many varminters are now looking at centerfire options to the 17 HMR cartridge, as 17 HMR ammo prices continue to climb. A 50-round box of 17 HMR can now cost $14.00 or more.
Colt Mfg. has announced a 
