The idea here is to just take raw numbers and random cartridges of the same type (other than the differences in primers) and test velocities. It is my hope that over time, differences such as case capacities of different brands and projectile hardness, and O.A.L. will average out.

My Hypothesis is that the small pistol primers will have a larger standard deviation. The idea being that the powder is ignited less evenly. So far the results are inconclusive as I will need thousands of rounds to correlate the data. However, the preliminary results do in fact so a larger SD in the small pistol primed cartridges. This is most definitely chance at this point.

**Large Pistol Primers**

Extreme Spread: 101

High: 725

Low: 624

Mean Average Velocity: 671.779

Standard Deviation: 27.7562

3 Sigma: 83.2687

Number of Samples: 19

**Small Pistol Primers**

Extreme Spread: 126

High: 724

Low: 598

Mean Average Velocity: 674.1

Standard Deviation: 30.999

3 Sigma: 92.9971

Number of Samples: 19

**Large Pistol 2nd Session Combined**

Extreme Spread: 102

High: 725

Low: 623

Mean Average Velocity: 673.097

Standard Deviation: 26.5129

3 Sigma: 79.5388

Number of Samples: 30

**Small Pistol 2nd Session Combined**

Extreme Spread: 126

High: 724

Low: 598

Mean Average Velocity: 675.14

Standard Deviation: 27.3608

3 Sigma: 82.0825

Number of Samples: 30

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