please sources for that claim. Actualy most usual AP penetrators have been steel or aloys containing steel. For the Russians and US anyway. The quality of the shell was or is still dependant on the used material and alloy. And particularly the Soviets and US did tried not to use to many different materials to make sure the shells could be produced in large numbers so it was always available. So I say it again HEAT shells have been RARE while usual KE (kynetic energy) penetrators have been the NORM. APCB, APCBC and APCR and APDS have been known and (more or less) the common shells. For which the later APCR and APDS have been pretty rare. Only some British guns had APDS shells (from what I know), the Russians most of the time used usual AP or APC (SU100, Su85 etc.) while the Germans had the APCBC as standart and APCR in small numbers available.
~ when I am talking about "steel" I am talking about the alloys which was used for the shells.
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