The 110's were "tested" against ground targets,ie tanks, but the type was found unsatisfactorily for whatever reason and the Stukas took over the duty.
Moot,the 37mm had tungsten core ammo,useless against bombers but on par with the 37mm on the Il2,depending on sources!
My point was that the 110 with the 37mm carried over 60 rounds,3 times the ammo of the Il2 or Stuka with 37mm guns
or the Bk5 and 6 pounder!
edit,my mistake the NS37 actually carries more rounds....
but I think the single BK3.7 would have a longer firing time.