LAST EDITED ON Feb-13-11 AT 05:03PM (MST)[p]I neck turn my brass. I go farther than 50% cleanup though, I go at least 80% cleanup. I mount the case holder in my lathe and hold the trimmer in my hand. With the lathe at the slowest speed, it goes quick. I can NT a case in about 10 seconds.
I have found that after I NT the brass my accuracy is better. I had a bunch of cases with large weight deltas. Sorting them was a pain. After I NT the brass, they were all within .2 gr. I NT .22, .24, .25, .30 calibers so far. Once I get a mandrel for .338" they will get done also. I found the neck tension is much more uniform when everything is equal.
Is there much difference at 100-200 yards? Not enough to make it worth while, but at 600+ it does make a difference.
Throw in annealing and then neck size the brass and it's ready to rock.