I havent seen of anyone getting readings like yours.
your gun reminds me of a story of a carburetor made back in the '50's that would get 100 mpg and when it was on a car that was sold to an emploryee, they put a lock box around it and told him if he ever needed work on his car to bring it back to the facrtory.
either you have a very exceptionaly, different Prod than others or your doing something totally wrong when you test. I dont think your doing any thing wrong when you test, but if you ever want to trade guns, and want a normal to below average gun , let me know
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one step closer to the ultimate goal