7.92x57mm Mauser - Different "linear" primer strikes


#1

Here are some different “linear” primer strikes (7.92x57mm Mauser…)
So, different (L)MGs…?!?

Thank you .

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.


#2

oblong trail leaves here this machine gun:

If I correctly understood the question, my English is very bad)


#3

So, to reformulate the question :

Do these different “linear” primer strikes (7.92x57mm Mauser …) indicate different “types” of (L)MGs ?

At least #4, #7 and #11 (the difference between these primer strikes and the other primer strikes is obvious !) …?!?

I know, the first “variant” is ZB 30 LMG, BUT…?!?

(Note: all of these “cartridges” ‘comes from’ the same “area” …)