Well, no, not tapered, but the recessed "columns" in a barrel, called fluting, say, 5-6 different channels or columns, where material is removed -it's supposed to make the barrel stiffer and therefore more accurate, and lighter as well, and I guess it does, but with less material, this obviously makes it weaker at the recessed areas as well - thinner is always weaker.
In any event, thanks for the heads-up - hope no one gets hurt from this defect. Sounds like you were lucky, and the shooter was REALLY lucky!
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