The falcon can pepper even top tier MBTs like paper mache, its actually a monster of a TD compared to how it is as a damn SPAA, I actively refuse to use it due to how stupidly absurd it is at killing tanks xD
Ill stick with my chieftain marksman.
I dont think barrels work in the game how you think they do.
I can take my 20mm fast firing type 87 and pepper barrels from tanks from literally any BR.
The issue is the amount of rounds put down range at the barrel / hits on it.
I do also use my main cannon on MBTs to take out a barrel or breach as its 90 percent of the time the best option if you cant get a kill shot.
To act as if the conquoror itself suffers from a weaker barrel is just silly, ive had my barrel instantly shot off nearly by gepard when im in an abrams, or the same for when im in a 2a6 getting ripped off by say a za35.
swings and roundabouts