Unidentified 7 x 57 Mauser

Can anyone provide any information on these cartridges.

I have a very similar 8 x 57 round made in Italy and without the cannelures at the base.It has a fake primer and is a dummy / exercise cartridge

I agree with Pivi that these are dummy rounds, not proof rounds. Proof rounds would not likely to be such a mixture of headstamps.

However, these are Brazilian 7 x 57m/m Mauser cartridges. The are not 8m/m Mauser. Note the long necks and bullet diameter. The headstamps indicated case manufacture by Fabrica Realengo.

Ooops. That’s embarassing; they are indeed 7 x 57. Thanks, John.