The Geotechnical Enginneering Handbook probably has the answers to this, though I'm not sharp enough to decipher the techno-talk in the book. I can't get hyperlinks to work on HEF--the only clue I can give you is to do a Google Search for "Volume of Shot Rock", and look for the "Geotechnical Enginneering Handbook" link.
If you can access this manual, browse the entire thing. I found some info on volume and hauling around page 471. Maybe another HEF member can decipher the handbook. The shot volume is going to depend on the type of rock and the various parameters used for the blasting, i.e. the depth of the holes, drill hole pattern and spacing, etc. which will affect the size (mix of sizes) of the shot rock.
I'll ask my friend at the quarry next time I talk to him if there is a rough figure they use for the limestone quarry.