It is said that NATO tanks have absolute advantage at the range of 2000m-4000m. This is correct until the Soviets brought up a fresh tank units that can fire AT-11
1204 hrs - 1/1/48th Gds Tank Rgt : fires 125mm 2A46 basic hit chance of (2%) against a Challenger 1 at a range of 3500m / 4340m
1207 hrs - 1/1/48th Gds Tank Rgt : fires AT-11 Sniper basic hit chance of (59%) against a Challenger 1 at a range of 3500m / 3255m
1207 hrs - 1/1/48th Gds Tank Rgt (12 x T-80BV [m]) in 0926 is engaging a recce unit (2 Tank) in hex 0919 at range 3,349m.
This British HQ was dug in a hex with 30% cover, it was wiped out by a salvo of AT-11. Note the difference on the hit chance between 125mm APFSDS and AT-11 ATGM.