Originally Posted by Sako7STW
I am wondering if most of you wait to turn your necks till after your brass has been once fired or if you do it during the first loadings of new brass? Last time I did my brass I didn't have the turning tool till after they had been once, maybe even twice.
The reason that you turn the necks of brass is to =
1= True up the neck thickness.
2= Turn the neck to fit the chamber better.
3= Uniform the neck tension on your bullets for consistant/best accuracy.
It is best to turn the necks before fire forming because if the neck wall thickness
varies, the first time fired will offset the inside of the neck by whatever the thickness
variation. and because the chamber is centered on the bore the brass will have
run out from then on.
If you turn and then fire form, the brass will be as true as the chamber.
Check the thickness of all new brass with a micrometer and using the case with the
thinnest wall thickness set the neck turning tool to just clean up this case and then
do the rest the same thickness.(No More than nessary).
If you have a wild cat that uses larger neck sizes (Like .338 to .308) turn the necks
before you size them down and they will be more concentric.and ready to fire form.
J E CUSTOM