Aircraft weapons

[Marcello]

"Using the cannon, the A-10 is capable of disabling a main battle tank from a range of over 6,500m."

I don't buy it, it would not exactly be the first time that the SPG Media websites write some bull**** so it should not be takes as gospel; as usual logic and common sense apply.
Just because a round is made of DU it does not become a magic bullet capable of piercing any armor at any distance.
The penetration figures listed seem to be consistent with what you would expect from an AP round of that age.
It is also sufficient to take out a tank either by mobility kill via engine deck/tracks hits or penetration of rear and top armor. Most soviet tanks, but even contemporary western designs like the Abrams, had top and rear armor in the 40mm range which could be penetrated according to the listed data. The dive angle would work against it by increasing LOS thickness but multiple impacts
might weaken the armor.
Against the intended targets therefore it should work, although I would not bet it was a 100% affair, but I would suspect that modern MBTs designed with top attack in mind would give it trouble (engine hits aside).

I am sure you could squeeze a much greater penetration from the gun but you would have to go down the sabot route and that apparently is not an option due to the petals ingestion issue. Besides there are more convenient ways to take out armor and it is mostly used against soft targets nowadays so why bother?