I understand that Holley jets are rated by flow and not by numbered drill size.

That said, seems a little wasteful in the man-hours dept to check each jet.
Far better to drill a couple hundred with one drill, then step up to the next drill size for the next batch.

If they are rated by flow, more than likely one or two jets out of a batch are checked and rated.

Nothing like adding a little confusion to the mix.

I like Holley's and this is just part of the fun.

Even so, I think I'll stick with my Erector Set carb....