"At the request of the Office, Chief of Ordnance, one Chinese 57MM HEAT shell captured in the Korean theatre of operations was submitted to this Arsenal by Picatinny Arsenal for metallurgical examination. The shell as received at Watertown Arsenal was inerted and without fuze. Frankford Arsenal Ordnance Laboratory Report No. MR-489 contains the results of the examination of the steel cartridge case for the subject shell and the results of the examination of explosive charges and fuze train components are contained in Picatinny Arsenal Technical Report No. 1835. The shell was visually examined and photographed, after which dimensions were measured for preparation of a dimensioned drawing. A longitudinal slice, cut through the center of the shell, was surface ground for hardness and macroetch testing. Specimens were obtained from all components for hardness testing, microscopic examination, and chemical analysis whereever possible."

Object --Summary -- Conclusions -- Introduction -- 57MM HEAT shell for recoilless rifle, (Chinese), FMAM 2039 -- Test procedure -- Data and discussion -- Visual observation and design of shell -- Metallurgical characteristics of shell components -- General considerations -- Appendix A Letter file ORDBB-T 386. 3/6-39, WTN 386. 3-571 (R).