Polish small arms ammunition with iron/steel case before II WW
I search information about polish small arms ammunition made with case from iron/steel before II WW.
What I know in short cut :
project began at the beginning 30’s
first materials used for test was low chromic steel (c. 4% Cr) and iron “Armco”. This tests not to finish gone out how waited.
probably in further researches one assembled on material nearing to “Armco” but without buying of licence on his productions.
also tested many methods of protection of ammunition before corrosion by: tinning, coating with copper chemical, parkerising, bonderizing
in late years 30’s Z.A “Pocisk” and “Państwowa Fabryka Amunicji” w Skarżysku tested production ammunition with iron/steel case in many combinations. But nothing I know about materials used in tests
probably exists display board with polish ammunition (made by Z.A. “Pocisk”) found by U.S. Army in factory" Polte" in 1945
I have one short note from article published in 1937 about polish signal ammunition (25mm or 35mm) made with iron/steel case but never I not see (found) this.
Not exist information about tests for pistol ammunition with iron/steel case
What i search:
Regenstreif P.; Munitions Polonaises d’Armes Legeres 1919-39, 1996
Regenstreif P.; Les cartouches polonaises calibre 7,92x57 (1920-1940); AMI
picture this ammunition with headstamps or picture display board with this.
Best Regards: Piotr J. Bochyński