I think it probably does. However, I'd rather have 100 bolts that I know are good and good to 5000 rounds (for example) than 100 bolts, of which 3 may fail at low round counts and 97 of which are good to 6000 rounds (again, just an example).
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I don't see anywhere on DD's website that they mention HPT on their barrels, just that they MPI on site. Description of bolt mentions all tests/inspections.