Unfortunately I don't have an example of a Japanese military 7.7 rifle round in my collection.
"The 7.7 rimless rifle cartridge apparently will feed from the strips, but I have been told that the gun will be unreliable because the extractor won't always grab the smaller rim. I cannot test this condition, as I have no Type 99 HMG handy, so I am going by what I have read."
The Type 99 was a magazine fed light/medium machine gun. The Type 92 was based on the Hotchkiss pattern and used the 30-round clips.
I have, around here somewhere, a 30-round clip for the Type 92.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.