Concentricity

[TXbaldhunter]

I kinda learned a few things using the gauge.Starting out with new brass run through the full length die,near zero runout.Second firing,still near zero runout.Third firing,a little more runout starting to show up,but not too bad.Forth firing,a little more runout than the third fired cases.Cases annealed after forth firing and loaded the fifth time,runout was reduced to like second or third fired brass.So my conclusion was,if the brass was good to start with,runout was low.If I had a case or two that had high runout from the start,I separate those out.I anneal around the third or forth firing.I think as the brass gets harder,the resistance seating the bullet may be causing some of the runout.I never payed that much attention to my brass until I got the gauge,more size,load and go.Since then I write on the cases the number of times it has been fired,that way it keeps my brass more consistent in how I treat it.