Originally Posted By: CatShooterOriginally Posted By: Furhunter
.004 is a bit tight for neck tension. I try to keep mine about .002 or so.
A question I have always wanted an answer to.
How do you measure tension (which is a force) in thousandths of an inch (which is a linear measurement)??
Regardless of what measurement your bushing says, the "tension" is determined by the amount of brass hardness, and the amount of neck spring back, and how much of the neck you sized.
If you size 1/2 of the neck with a -0.008" bushing, is it the same as sizing the whole neck with an -0.004" bushing (assuming the bullet contacts the whole neck).
I think you can only measure neck tension with a gauged arbor press and actually measure the seating force.
Stating that there is 0.004" of neck tension is meaningless, so you cannot say that 0.004" is too little or too much... of what??
Bullets seated in annealed necks will seat softer with a -0.004" bushing, then bullets will seat in necks that are not annealed with a 0.002" bushing.
We go to extremes to quantify everything, even that which is not quantifiable.
Give it some thought...
... lemme know what you think??
Cat.
Who's to say with annealed brass that once the bullet is seated its not all the same anyways? I agree with everything you said above, my only point to the OP was that .004 was a bit outside the norm of what most generally try to achieve.
