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W.R.Buchanan;n4935 wrote: these barrel constrictions are a result of roll marking and cutting dovetails in the barrels after the barrel has been rifled. I really don’t see for the life of me why they don’t reverse the order of operations and Roll Mark after the barrel is bored and then rifle after.
If they are using Cut, Broached or Button Rifling techniques they would easily iron out any intrusions into the bore from these external operations, and eliminate these problems for good.
I’m not sure if it’s the cutting of the dovetail or the fitting of the sight/ring, but yeah. It would seem a simple enough thing to fix. I wish ‘they’ would.