If I bring my small digital scale to taco bell and I weigh out one of their 1/2 pound burritos under 1/2?

If I bring my small digital scale to taco bell and I weigh out one of their 1/2 pound burritos under 1/2?

If I bring my small digital scale to taco bell and I weigh out one of their 1/2 pound burritos under 1/2 a pound, can I get a new one// get them to put more food in it?
Nice to know :}