Explain something about bushing dies to me....

[Marksman]

I'm considering getting a tight neck chamber 6XC that will be reamed with a 0.272" neck. Does this mean that from here I can order a 0.270" bushing and be set? I know I'll have to turn my cases so that I'm getting neck thickness of ((0.272-.243)/2)=0.0135".


The next question is regarding the die itself. If I get a Neck Bushing die, it appears to come with an expander ball and decapper. If the brass is being drawn back over an expander ball, what difference does the neck bushing matter? Or would I be better off running the brass through the die once with no bushing to expand the neck, then remove the expander assembly and install the bushing and run it through again?

 

[sandwarrior]

Re: Explain something about bushing dies to me....

Marksman,

They have a depriming stem just like the regular neck and full length die but no expander ball. You run the case up into the neck of the die it squeezes it down .001-.002 or as much as you want. At that time then the deprimer pops the primer out just like usual. Then when it comes out it doesn't touch anything.

 

[ChrisGarrett]

Re: Explain something about bushing dies to me....

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Marksman</div><div class="ubbcode-body">I'm considering getting a tight neck chamber 6XC that will be reamed with a 0.272" neck. Does this mean that from here I can order a 0.270" bushing and be set? I know I'll have to turn my cases so that I'm getting neck thickness of ((0.272-.243)/2)=0.0135".


The next question is regarding the die itself. If I get a Neck Bushing die, it appears to come with an expander ball and decapper. If the brass is being drawn back over an expander ball, what difference does the neck bushing matter? Or would I be better off running the brass through the die once with no bushing to expand the neck, then remove the expander assembly and install the bushing and run it through again? </div></div>

Point 1:

You're going to have to do the math on your match chamber and how much you want to leave for neck expansion. I think that I've read .001"-.002" is enough around the circumference of the neck, so depending on your brass, you'll have to either turn and/or play with bushing size.

Point 2:

Redding provides a generic, undersized, decapping pin retaining nut, which like the guy says above, replaces the expander ball and doesn't touch the inside of your neck, but holds the pin in place to allow for depriming.

Chris