Agree totally with fastest isn't most accurate, one of the reasons we reload is accuracy, when you factor in the cost of equipment if you only shoot a little reloading isn't any cheaper shoot lots.
But back on topic, factory ammo is neck sized till it needs trimming,scavenged brass is fl sized then length gauged before using once fired it's neck sized till it needs trimming then it gets a fl again. Bolt actions only here, I believe them new fangled automatic things need fl sizing that is if you can find the empties.
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