Yes, Stan. In statistics there are equations that predict how confident you may be in conclusions based on the variability of data and how much data you can gather. One such equation is "R-squared." It is a good predictor of how much data you need. For example, my little MOI machine has "R-squareds" of , usually, better than 99.9%. In said case, I would be safe with one data point. Note that the weight, balance, and MOI of any single gun does not vary. The only significant source of variability is bearing drag or weather vaneing in a strong air draft. With patterns there are many variables that may/may not be significant. I would take a SWAG that Jones used R-squared in his decision as to the number of data points required.
DDA
