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noylj · September 28, 2012, 04:51 PM

Actually, having had a bullet seated will do more for uniform neck tension than re-sizing. After seating a bullet, the neck ID should be at the perfect spot--0.001" under bullet OD. Measure some and see. This has been my finding for many cartridges--the expander gets me 0.002-0.003" under, where "perfect" is 0.001" and is found by getting a custom expander ball or, as in this, previously seating a bullet.
Your only concern is old "thumb pressure on the case with bullet nose on bench" set-back test, that you should be doing all the time any way.
Sometimes you already HAVE consistency and anything you do will simply lessen the consistency you want.

September 28, 2012, 04:51 PM	#6
noylj Senior Member Join Date: October 21, 2007 Location: Between CA and NM Posts: 858	Actually, having had a bullet seated will do more for uniform neck tension than re-sizing. After seating a bullet, the neck ID should be at the perfect spot--0.001" under bullet OD. Measure some and see. This has been my finding for many cartridges--the expander gets me 0.002-0.003" under, where "perfect" is 0.001" and is found by getting a custom expander ball or, as in this, previously seating a bullet. Your only concern is old "thumb pressure on the case with bullet nose on bench" set-back test, that you should be doing all the time any way. Sometimes you already HAVE consistency and anything you do will simply lessen the consistency you want.