I dont doubt its one of the best systems around for mere mortals of getting a pretty good idea of pressures run.
But as said above measurements,inputs and placements would have to be spot on and then you still have the fudge factor.
I would still put money on two different people with two different "Oehler ballistic labs" getting different numbers from the same rifle and load using there own measurements and placements and "fudge factor"
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