Odd looking 7.62x39 round - what is it?

[Dark Skies]

Amongst my last purchase of rounds from Oleg I found two with unusual grey round nosed bullets.
(see pic above the conventional round)

Like a conventional round it has a steel jacketed bullet (I put a magnet against both).
It has a steel cartridge case - same as standard.

However, when weighed it was found to be 187 grains compared to the conventional round which weighs 256.5 grains.

The head stamp markings are: 74 05

I wondered if the disparity in weight, 69.5 grains, is partly because there is no charge within . Shaking either round isn't much help as you can't hear any powder shifting in the normal round to begin with.

Is it some kind of training round?

[breacher]

Civilian hunting round ?

[DL.]

https://www.youtube.com/watch?v=UwsOO7TF0bA

[snayperskaya]

East German M43 Ub short range practice ammunition, bullet has a copper plated steel jacket with a plastic core

O5 is the factory number (Konigswartha factory, Eastern Saxony) and producd in 1974

[Dark Skies]

Cheers all.

[Maggot]

Dont fire it for christs sake....might be worth something to someone.

[Dark Skies]

Dont fire it for christs sake....might be worth something to someone.

I wasn't planning on it. Can't see it being worth much though.
Whilst I've not come across them before they are probably circulating in their millions in Eastern Europe.