Base amount of mash bill?

Lucas_2

I decided to take some time at the homemade distillery. I am aware that more "small" factors seem to be, changing the outcome of a whiskey, and therefore, none is equal to the other by itself. However, there is a "base number" related to the percentage ratio of Bourbon. Example: approximately 75-85% is corn. There is a base number of proportions. But what about the quantities per kg of grain, for example? I repeat: I know that every whiskey is a - even being bourbon - and I also know that the number of mash bill in quantity is secret. But is there no specialized estimate of some quantum basis?