Depending on the severity (height deviation from surrounding surface) Bulges can be tapped back down, against a mandrel. If chamber bulges can be tapped down, with thick walls, thinner walls further up the barrel shouldn't be difficult. Consultation with John Hosford or Breck Gorman would be a good starting point. That would be my route before I opted for something else, which will certainly impact the value as much as 50%.
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