I have recently bought meat at two different grocery stores. Weighing the packages at hom on two different electronic kitchen scales, the scales agreed: EVEN WHEN WEIGHED IN THE PACKAGING, all but one of eight packages of prepackaged packages of meat were short of the stated NET weight (weight WITHOUT packaging, supposedly), anywhere from 0.15 pounds to just over .26 pounds.
And that was INCLUDING the packaging in the weighing, so NOT even “net weight.”