Japanese 7.7SR type 92 HMG cartridge


7.7SR cartridge case,When I shot this photo,I had just polished it.

It’s difficult to see if your case has a headstamp or not. Most collector refrain from polishing cartridges as much important information (light headstamps, case mouth seals, primer seals, tip colors) can be lost.

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One thing you need to know is that Japanese Type 92 cartridge has no headstamp. In fact, most of Japanese WWII cartridges don’t have any headstamps.

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Thanks, but one thing I do know is that I have both 7.7x58 and 7.7x58SR rounds WITH headstamps. And if you are familiar with Japanese headstamps, you will notice that the faint markings at 9:00 on the pictured case have some vague similarity to known Japanese marks. Thus my comment. Ok?

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How do you tell the difference between a 7.7 x 58mm Type 92 Heavy M.G. A.P. and a 7,7 x 58mm Type 97 Light M.G. A.P.? Does the type 92 have a semi rim and the type 97 a rimless?

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hello
yes japanese using headstamped and non headstamped cartridges
but some of their hedastamps can be confused with “other” mark such extractor ,firing …

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Tom, I believe the variations on the 7.7mm ammunition is as follows:

Rimless:
Type 97 tank machine gun
Type 99 rifle
Type 99 LMG

Semi-rimmed:
Type 89 AMG
Type 92 HMG

Rimmed:
Type 98 Navy machine guns (both Lewis and Vickers).

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Type 92 HMG cartridge is semi-Rimmed
and Type 99 rifle cartridge is Rimless.
I hope this will help,friend

Thanks for the info! Tom from MN

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