What is this round?

303 british?

Looks to me like it could be 7,92x57, a.k.a., 8mm Mauser.

GBExpat said:

Looks to me like it could be 7,92x57, a.k.a., 8mm Mauser.

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Same guess here.

Except the + - means it's rechargeable. lol.

Definitely not 303 as the 303 was a rimmed and tapered cartridge (I have plenty) My vote is also for 8mm Mauser. Bullet is likely in the ~190-200gr weight.

Looks like a 8x57 without seeing it next to a ruler marked in metric. The bullet looks silver on my screen. If so it's one of the earlier loadings. Doesn't look Turk. There were middle eastern countries who used it and Greece.

There is a Yugo or Czeck made PSL?( or similar model) semi auto sniper that was available in 7.62x54r and 8x57.
https://en.wikipedia.org/wiki/Zastava_M76

Looks like 7,92X57 or the 8mm.

If you have a caliper 3 measurements would make certain. The rim diameter, bullet diameter, and case length. My first thought was 8mm Mauser as well

"...from this round..." With, not from.
The '3' indicates Ulyanovsk Machinery Plant State Production Association, 2 Metallistov St. Ulyanovosk 432031, Russia. Still thinking 8mm Mauser too though. Russians loaded everything and supplied everybody in the Middle East.

No, it ain't.
The pictured round is a 7.92x57 (8mm) Mauser round, made in Czechoslovakia in 1951. This is 200% fact, no other identification. The headstamp uses one of a number of factory symbol codes used for export contracts.

jonnyc said:

No, it ain't.
The pictured round is a 7.92x57 (8mm) Mauser round, made in Czechoslovakia in 1951. This is 200% fact, no other identification. The headstamp uses one of a number of factory symbol codes used for export contracts.

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I’m placing my money on jonnyc.

In this case........good bet. ; )

cdb1 said:

I’m placing my money on jonnyc.

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+1

look at his credentials.

8x57 Mauser was my guess also, ( I reload 8x57). Was looking at this thread last night and even held up an 8x57 round from my K-98 in front of the posted picture on the screen and did a visual comparison. They sure looked similar. Was gonna post my guess last night but it was getting late. Now I'm wondering what 8 x 57 rifle was being used against our guys in Afghanistan?

My BIL used to have a Romak PSL in 7.62x54r with the issued sniper scope. We put a couple 100 rounds through it and the accuracy was great. 1" groups at 100yds with surplus ammo it liked. Many times several holes touching. So I'd think the M76 is as good or better. Zestava makes good firearms. Many people think they are a Russian Dragnnov but they are completely different. Quickest way to tell the diff is look at the mag position. Dragunov has space between the trigger guard and mag. The PSL style the mag is right against the Tg/mag latch.
https://en.wikipedia.org/wiki/PSL_(rifle)