The best 125mm APFSDS used by Ukrainian army is the 3BM-42 Mango
However by far the most common is the 3BM-22 Zakolka.
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125mm 3BM-22 'Zakolka'
400mm x 36mm avg. Steel Rod at 1760m/s
Features 88mm long tungsten alloy tip which also acts like penetrator but only 35mm of it extends above the steel...