At one point, S&W fired a proof cartridge for each chamber (5-10)
for a revolver, 1 for an auto pistol), plus a cylinder or magazine of standard cartridges for function testing.
Ruger did the same thing, and a Ruger rep once told me that they eliminated an extimated 99+% of customer service complaints that way and considered the cost well worth it both in PR and in nearly eliminating warranty repairs.
Today, with increased costs, I don't know if those companies still adhere to those testing prcedures, but even with the best quality control in manufacturing, I think they would still benefit by factory test firing.
Jim
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