These are the figures from my 500 un regulated. And this is from shot 30 to 82 .

180 bar fill down to 110 bar using out of the tin AA 4.52

Population size:52

Mean (μ): 784.75

Median: 785 Modes: 783 787

Lowest value: 776

Highest value: 792

Range: 16

Interquartile range: 4

First quartile: 783

Third quartile: 787

Variance (σ2): 10.302884615385

Standard deviation (σ): 3.2098106821719
Quartile deviation: 2

Mean absolute deviation (MAD): 2.5865384615385

If I fill to approx 166, in reality I put 180 bar this puts the rifle on its sweet spot approx. 52 shots, I`ve left it at that as it shoots really well and it only drops fractions after shot 82 .. I don`t know what I`m on about but I like to fiddle If I were to wash, weigh ,sort etc I would expect a decrease in the 3.2 deviation but as it is it`s extremely accurate. These were produced in this programme thanks to Airsporter 1st

http://www.alcula.com/calculators/statistics/variance/ Regards Gordon.