wow - homework
glad to help Pete
5 random pellets weighed ( on my RCBS beam scale) 14.6 grains
one ounce of these #4's (437.5 grains on the RCBS- and checked at 1 oz on my postal scale) contains 150/152 pellets (did it twice)
the bottle says they are .130 diameter
i measured two - they both came out at .133 on my digital caliper
I see lead 4's listed as 132 to 137 pellets per once depending on the chart
so only 13 to 18 extras- I think this is pretty close - so far the ducks have not complained about being shorted