6br loading issue

[Two Bears]

I am loading new Remington brass, I ran through the sizer first, when seating the bullet I have almost zero neck tension.
I can actually lightly twist the bullet out with my fingers.
I noticed the same thing with some necked down 7br brass.

Now if I load the same new rem brass without sizing the neck tension is pretty good.

Using Redding dies and they are marked #4.
Pic of dies in next post

Any ideas what I am doing wrong here?

Kinda new to reloading bottle necks, mostly load straight wall ammo.

 

[Two Bears]

https://imgur.com/a/A1vBiJI

 

[rwj]

Very odd indeed! Have you measured the sizing die’s neck ID? Please share any other measurements taken as they may be very helpful in diagnosing the problem!

 

[Bill Norris]

Sounds like an over-size neck area inside the die. Did u check neck thickness by any chance?

 

[kevinbritvec]

Measure your expander button. Spin polish it to a smaller diameter to gain more neck tension.

.241" for a tight grip. .242" for medium. .243" for light.

 

[Two Bears]

The button is .242

 

[Walt Krafft]

What size bushing are you using?

 

[foxguy]

Measured diameter of Bullets?

 

[Two Bears]

No bushing.

V Max measured= .243

 

[rwj]

Having now viewed the die set picture, it appears that you have both body and full length (FL) sizing dies. Be advised that the body die (appears on the far left in the pic) does not size the neck. As @Walt Krafft notes above, this area would be sized via a bushing in the full length die.

 

[Two Bears]

Forgive me but what are these bushings?
Using Redding # 80317 dies.
Should I be using something else?

 

[CaptainMal]

If it is a bushing die with no bushing then it is not sizing the neck. Check that out.

Measure the thickness of the brass in the neck. It is probably something like .014" or a little more. Now measure the outside diameter of the next coming out of the die. It should be something like ..266" to maybe .270" at the largest. If it is larger than that, you are not sizing the neck.

 

[CaptainMal]

Bushing dies are common. They do not size the neck but take little "bushings" that fit into the top of the sizing die or in your case, probably just a decaying die or some combination as it is a three-die set. One of those two, not the seating's die, should have a bushing in it. The bushings are just circular tubes that fit into the neck area of the die. They are sized and stamped with something around .264" + or -.

Redding and Wilson are popular makes of the bushings.

 

[Bill Norris]

According to part # Redding 80317 reference his dies are just regular non bushing so seemingly it would be an issue with the neck area of his die.

 

[dolek]

Two Bears,

Did you buy these dies new ? I ask because if they were used maybe the die had been honed .

 

[rockhound78]

After sizing, can you feel any resistance when you pull the neck over the expander ball? Try running a dummy case thru the size die , with the expander removed, and see what the seating pressure is, if it has changed

 

[rwj]

Here’s a link to the Redding online catalog... http://www.redding-reloading.com/images/stories/2020PressInfo/2020_Redding_Cat.pdf See pages 6 and 7 for details regarding the full length/neck and body sizing dies, or the attached images.

 

[kevinbritvec]

To clear things up, remove the expander ball completely and resize a fired case without it. This will establish how much neck tension the die is introducing on it's own. From that measurement you'll be able to find the culprit.

You stated you are using Remington brass. New Remington 6mmBR brass, or are you reforming cases from a different caliber? I thought Remington stopped making 6mmBR brass, or only in rare limited runs. Brass resists large changes. It "springs back" a little after resizing. The bigger the change in neck diameter, the larger the spring back.

 

[Two Bears]

The dies are used prior to me getting them.

The brass is NEW Remington brass.

I can not feel the button or faintly can on some.

I also have 7br necked down with the same issue. But I just checked some that were fired and when running them through the dies it is definitely felt running the button through the die.
Fired they measure .269-.270
After they are .267 (same as the 6br cases).
Inside .241 pre sizing.
.239-.240 after without using the button.

The 6br brass:
.267 not sized but loaded.
..267 after button.
.242 button size - so it looks like the button is not really doing anything.

I think the FL die may very well be honed out a little.

 

[dolek]

The dies are used prior to me getting them.

The brass is NEW Remington brass.

I can not feel the button or faintly can on some.

I also have 7br necked down with the same issue. But I just checked some that were fired and when running them through the dies it is definitely felt running the button through the die.
Fired they measure .269-.270
After they are .267 (same as the 6br cases).
Inside .241 pre sizing.
.239-.240 after without using the button.

The 6br brass:
.267 not sized but loaded.
..267 after button.
.242 button size - so it looks like the button is not really doing anything.

I think the FL die may very well be honed out a little.

Been there,that is why I mentioned it . Good to see you are solving the mystery.