Barrels from the same production run should perform similarly, but like any process, there are slight variations from part to part that are within acceptable tolerance and perhaps a few outside tolerance that should be caught and corrected in QC.
The variables are almost to numerous to mention, but broadly speaking, they are:
the blank
the machining fixturing
chamber tooling/gaging
crown
lining/coating
Large differences in one or many of these areas are probable between two different barrel makers. Just changing blanks can produce differences.


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