主题：二战英国和英联邦国家援助苏联物资 -- donkeyking

British Ammunition Quality

The British used ammunition of ‘calibration’ standard for testing, which was top quality.

German Ammunition Quality

The British Intelligence Objectives Subcommittee report German Tank Armour dated 1946 includes information that an approximate 5% to 10% deficit could be demonstrated by production quality ammunition compared to that used for testing.

Soviet Ammunition Quality

The ammunition quality used for Soviet testing is unknown. However Soviet quality control was generally poor and ammunition was substandard up until about 1944, which would degrade penetration in unpredictable ways. I would expect that this means that some ammunition would perform better than predicted and some worse, or even considerably worse.

USA Ammunition Quality

There is some evidence to suggest that the USA used normal production quality ammunition in tests.