I was looking though the US Army data sheets on the 76mm ammunition for the 76 x 575 ammunition for the M32 tank gun ( https://books.google.co.uk/books?id=tHk-AAAAYAAJ&pg=SA2-PA19&lpg=SA2-PA19&dq=M339+AP-T&source=bl&ots=-q9DH5EIeT&sig=B0hbewKk1vt8naWrWV9e71ea0Ng&hl=en&sa=X&ei=qRLrVObrAtTvavvBgoAC&ved=0CE4Q6AEwBw#v=onepage&q=M339%20AP-T&f=false ) and came across a statement concerning the M339 AP-T, which states that the solid, full-calibre projectile is made from “solid tungsten carbide”.
I believe this has to be wrong. Tungsten carbide is only used in sub-calibre penetrators because it is so dense that a full-calibre shot would be far too heavy. I believe that what was meant was “tungsten steel”, a hardened steel which contains about 4% tungsten, which is used in other US AP ammunition. Can anyone comment?