Calledflyer
Portville is a small town in western NY ,P1 and I shot some modern benchrest matches there a few years ago.
Not sure why he posted that , maybe he thinks I am trying to make my cast bullets shoot as well as 6PPC did and we would not want that.
Dale S

Out of curiosity I turned necks on two cases today. Both 30-30 made by Remington. The first I turned as a 30-30. It did not clean up completely at .0025” removed. At .0015” contact was distinctly lopsided, about 60% contact around the neck.

The second case, I ran through a 25-35 die and then expanded the neck back out to .284. It cleaned up with .0028” removed. Again it was very clearly one sided removal. 

Finished thickness is .009”, minimum thickness that I could measure before turning was almost .011.

These might have been the worst necks I have ever turned. Besides clearly only cutting one side, there were plenty of high spots.

No  idea if cleaning them up will help in a Breech seated firing, but from what I found, necks being about .0015” thicker on one side, shooting points of a square by rotating the case 1/4 turn each time seems possible.

JLouis wrote on Jun 3^rd, 2018 at 2:15pm:


I do it on my BR brass, but with a chamber for a loose neck, it is a waste of time.