I never had knowledge of this cartridge with wooden projectile, nor exercise of that caliber.
I tried to translate, seems they are tracer rounds.
regards
Google translation, Hungarian: magvas nyomjelzo tolteny = seedy tracer rounds of ammunition (?). Nyomjelzo = tracer.
Hungarian box for 12.7mm M40 tracers?
What are the headstamps?
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Sorryy ... I can't answer ... :tinysmile_cry_t: