Questions about the 6.5 "G" cartridge

[Krag]

I'm doing an article on the Japanese Type 11 light machine gun and have found a contradiction about the cartridge. Most sources say it used the 6.5 G "reduced charge" cartridge that produced lower pressures and velocities than the standard 6.5 Arisaka. But I just saw an episode of the NRA's "I Have this Old Gun" on TV and they claim the G cartridge was loaded with an improved powder but was otherwise identical ballistically to the standard cartridge.

Can you shed any light on this?

Many thanks.

[Sapper740]

The 'G' round was produced to reduce muzzle flash in the 17 1/2" barrel of the Type 11 without substantially altering its ballistics.

[Krag]

thanks so much!