No. A typical revolver cylinder has six chambers (some more, some fewer). Each chamber has a throat. There is no such thing as a "cylinder throat."
"Match" and "equal" are not synonyms. For example, when you take apart two bolt action rifles, you should match each bolt to the rifle from which it was removed. The bolts are correctly matched to their rifles if each rifle is reassembled with the bolt it came with.
A cast bullet is correctly matched to the chamber in which it will be fired if the bullet is ever so slightly smaller than the throat of the chamber.