full length bushing die sizing question

[tillroot1]

Folks, I have a question related to a 6BRA chamber in my light gun. Its a Wheeler #1 chambering done with a JGS reamer. .268 neck diameter. I have a Whidden threaded FL bushing die to size with. My question is, when setting the die up for the sizing of the neck, how many of you are sizing the entire neck and how many of you are sizing just the portion the bullet is seated into and leaving the rest of the neck unsized? Which is better? does it make a difference? I am only sizing the area of the neck that the bullet is seated against and have heard it go both ways.

Thanks for your time,

Ron Tilley

 

[Bc'z]

Ron I've never used a Whidden bushing die so I can can't say for certain that it'll size the whole neck.
I can tell you that with Wilson, Redding, and Hornady bushing dies they only size about 3/4-2/3 of the neck.

 

[PopCharlie]

With Whidden dies, the bushing leaves a small amount of the neck, close to the shoulder, unsized. Since the bushings have a radius on the bottom, it leaves a radius on the sized brass that tapers into the neck shoulder junction. You can insert the bushing upside down if you don't want the taper. Redding bushings are the same, and work in the Whidden dies. Visa-versa too.
One thing to be aware of, if you use the bushings inverted, don't size the neck too much. It is possible collapse the neck. The radius on the bushing is designed to prevent that.

I've tried the bushing inserted both ways. I cant tell a difference in accuracy. YMMV. Test it for yourself, and see. Hopefully, someone more knowledgeable will chime in.

PopCharlie

Edit: I have never used Hornady dies or bushing.

 

[284winner]

Ron I've never used a Whidden bushing die so I can can't say for certain that it'll size the whole neck.
I can tell you that with Wilson, Redding, and Hornady bushing dies they only size about 3/4-2/3 of the neck.

I had problems when sizing down 6.5 brass to .257 brass due to your response. It left a tiny bit of the neck too large to easily chamber without a hard bolt close. I readjusted the die so the press arm had a little resistance at the bottom and cammed over a bit. Locked the neck bushing in the die tight and when I sized the necks after that, they fully sized down to .257 ( or whatever the bushing size is). Wouldn't have really noticed this issue if it wasn't for me using my Hornady OAL tool and modified case to check the cartridge OAL. I couldn't push the modified case in the chamber all the way without really pushing hard till it seated ( my modified case was made by me from 6.5 brass necked down ). It was then I realized why.

 

[tillroot1]

I should have been more clear. I intentionally only size only the portion the bullet rides on, I don't really see the need to size the rest of the neck. It ends up being right at half the length of the neck being resized. I could size the entire neck but question the need to do it if the bullet never touches it. I would think it would work harden it for no reason.

 

[ljmontano]

HERE YOU GO

 

[mikecr]

I could size the entire neck but question the need to do it if the bullet never touches it. I would think it would work harden it for no reason.

It will put a high binding tension on the bullet's bearing-base junction. It also brings donut thickness into this binding tension.
No reason to think that would be a consistent grip.

There is no benefit to FL sizing necks. Only detriment.