Historical Russian 125mm APFSDS penetration:
3BM9
245mm @ 2000m (0)
140mm @ 2000m (60)
112mm @ 2000m (68) - 299mm LOS
3BM15
400mm @ 2000m (0)
150mm @ 2000m (60)
120mm @ 2000m (68) - 320mm LOS
3BM22
420mm @ 2000m (0)
170mm @ 2000m (60)
136mm @ 2000m (68) - 363mm LOS
3BM26
410mm @ 2000m (0)
200mm @ 2000m (60)
160mm @ 2000m (68) - 427mm LOS
3BM29
360mm @ 2000m (0)
210mm @ 2000m (60)
168mm @ 2000m (68) - 448mm LOS
3BM32
395mm @ 2000m (0)
230mm @ 2000m (60)
184mm @ 2000m (68) - 491mm LOS
3BM42
395mm @ 2000m (0)
230mm @ 2000m (60)
184mm @ 2000m (68) - 491mm LOS
3BM42M
???mm @ 2000m (0)
???mm @ 2000m (60)
???mm @ 2000m (68) - ???mm LOS
3BM42-2
480mm @ 2000m (0)
280mm @ 2000m (60)
224mm @ 2000m (68) - 597mm LOS
3BM46
495mm @ 2000m (0)
290mm @ 2000m (60)
232mm @ 2000m (68) - 619mm LOS
3BM59
535mm @ 2000m (0)
312.5mm @ 2000m (60)
250mm @ 2000m (68) - 667mm LOS
3BM60
515mm @ 2000m (0)
300mm @ 2000m (60)
240mm @ 2000m (68) - 640mm LOS
3BM42-2
685mm Long Cartridge
615mm Long Projectile
570mm x 22mm Jacketed APFSDS at 1700m/s muzzle velocity
570mm x 18mm WHA Core
65m/s per 1km drop rate
Penetration:
522mm @ 0m - 1700m/s
480mm @ 2000m - 1570m/s
3BM60
735mm Long Cartridge
715mm Long Projectile
640mm x 22mm Jacketed APFSDS at 1660m/s
640mm x 18mm WHA Core
65m/s per 1km drop rate
Penetration:
564mm @ 0m - 1660m/s
515mm @ 2000m - 1530m/s
3BM59
735mm Long Cartridge
715mm Long Projectile
640mm x 22mm Jacketed APFSDS at 1650m/s
640mm x 18mm Depleted Uranium Core
65m/s per 1km drop rate
Penetration:
571mm @ 0m - 1650m/s
535mm @ 2000m - 1520m/s