From another practical perspective the question is "when buying a rifle, how do I assess the actual quality of the barrel" because marketing hype aside, barrels do vary in quality.
Wether it's a modestly priced factory rifle like a Tikka, expensive factory like a Sako, or custom like a Trueflite or Bartelin, you'd generally expect to get what you pay for (the occasional complete dud that any manufacturing can produce from time to time accepted).
The fact that this statistical approach better informs us of a barrels accuracy (versus the old "you need to tune the load to the barrel and them I can rely on poor statistical analysis to provide a warranty/guarantee of sub MOA or whatever) might provide some challenges to gunmakers if it catches on.
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