Redding Match Full Length Sizing Only 75% of Neck?

[Ccrider]

The more I read about neck tension, the less I know.

 

[dcali]

The more I read about neck tension, the less I know.

I think we’re all in that boat!

 

[6ShotsOr5?]

If you look at your Redding bushing die you will see a short section of the die body neck area between the shoulder and the bushing. This short neck area of the die body does not size the case neck. Look at the image below and the die body and the bottom of the bushing that is never sized. You can even see the the die body neck section above the shoulder is larger in diameter than the bushing and is never sized.

Below the same full image on its side showing the where the die body does not size the neck just below the bushing. My guess is this is done to add strength to the die at the neck shoulder junction. Add this area to the rounded opening of the bushing explains why the bottom section of the case neck does not get sized.

I dunno, my die is not cut in half like that.

Actually the description with the picture is very helpful. Thanks for posting that.

 

[6ShotsOr5?]

You can take it to a machine shop and have that extra area took down a bit to lower the bushing. Warn them that it is very hard on the surface

Or you can bore out your bushing a few thousandths half way in, if you only want to size half the neck? I think I read something like that in another thread on this forum.

 

[spclark]

Or you can bore out your bushing a few thousandths half way in, if you only want to size half the neck.

Or you could just back the bushing stop nut off enough turns so it’s not hard against the die part that’s just ahead of the shoulder portion, easy-peasy.

There’s a whole range of adjustment there from 0% (not sizing neck at all) to 100% (stop nut run down until it won’t go any farther, then cracked back a teensy bit... but maybe not sizing 100% of your necks!), why they’re threaded.

 

[JFrank]

@SPJ said it well, especially if the bullet’s pressure ring is located in the sized section of the neck.

Yep

 

[338 dude]

View attachment 1118597 By looking at my bushings and you can clearly see one side is tapered so that it will center itself as the case comes into it . IDon’t believe this taper has anything to do with angle of shoulder it’s simply center is the bushing Sorry about the blurry photo so small but you can clearly see the shiny part of the bushing that is tapered and never touches the neck other than to center itself

 

[Joel Dubose]

View attachment 1118596 View attachment 1118598 View attachment 1118596 View attachment 1118597 By looking at my bushings and you can clearly see one side is tapered so that it will center itself as the case comes into it . IDon’t believe this taper has anything to do with angle of shoulder it’s simply center is the bushing Sorry about the blurry photo so small but you can clearly see the shiny part of the bushing that is tapered and never touches the neck other than to center itself

That radius adds to the problem shown in the photos of the cut away. Not only do you have the shelf that it sits on, but the radius adds to the length not sized. I keep my bushing as tight as possible for that very reason.

 

[338 dude]

That radius adds to the problem shown in the photos of the cut away. Not only do you have the shelf that it sits on, but the radius adds to the length not sized. I keep my bushing as tight as possible for that very reason.

Me too you tighten until it will go no more and back off as little as possible just so the bushing can move And I have heard of people flipping them over because of that radius but you would have to be very gentle entering the bushing so it can center up