You guys are giving me a headache.../ how much FPS is bled off to cycle the action ..???...geez....( who cares, is the answer that comes to my feeble old mind).../ what about the affect of humidity, air temperature, temp of the barrel, temp of the shell, .......
if you're going to really do this ...I think you need to do your tests of about 5 shells per gun / per day ....and 2 days a month ...over the next 12 months...( and see how much variation you get / and what the mean is ...etc...) all that junk I forgot from those foolish statistics courses...40 yrs ago...
you guys are killing me....
