Resizing 6gt Hornady brass

[josebd]

Took the measurement of a piece of fired brass,resized it ,I usually bump shoulder .001-.002 back,but I couldn’t with these(forster full length die)
no matter how far down I screwed the die in,now there actually .001 longer,which I know isn’t that bad,but I’ve never run across this?ive always been able to bump the shoulder a little
i do anneal before resizing
same results with the new brass or once fired

 

[dantiff2]

You need a shorter/ thinner shell holder.

 

[RegionRat]

I'm not clear on the issues yet.

Are you using a die that you have used before successfully, but now it doesn't work?
Or is this a new die?

Also, when brass is squeezed on the diameter, it usually has no place else to go but up (lengthen). So seeing some increase in length as the die works the diameters but before it engages the shoulder is normal.

Do you have any idea how this chamber is in terms of shoulder datum length when compared to a Go Gage? Is it right at that limit or longer by one or two mils?

Where was the brass shoulder datum before firing and where was it post firing?

 

[josebd]

The new brass after resizing and once fired brass after resizing is .001 longer than the measurement after firing in chamber

 

[KMart]

The new brass after resizing and once fired brass after resizing is .001 longer than the measurement after firing in chamber

After sizing this case, will it chamber in your rifle?
What is the difference, base to shoulder datum, between virgin brass and once fired brass?
You may just need to fire it a couple of more times to match your chamber.

 

[josebd]

I'm not clear on the issues yet.

Are you using a die that you have used before successfully, but now it doesn't work?
Or is this a new die?

Also, when brass is squeezed on the diameter, it usually has no place else to go but up (lengthen). So seeing some increase in length as the die works the diameters but before it engages the shoulder is normal.

Do you have any idea how this chamber is in terms of shoulder datum length when compared to a Go Gage? Is it right at that limit or longer by one or two mils?

Where was the brass shoulder datum before firing and where was it post firing?

New die

 

[josebd]

I'm not clear on the issues yet.

Are you using a die that you have used before successfully, but now it doesn't work?
Or is this a new die?

Also, when brass is squeezed on the diameter, it usually has no place else to go but up (lengthen). So seeing some increase in length as the die works the diameters but before it engages the shoulder is normal.

Do you have any idea how this chamber is in terms of shoulder datum length when compared to a Go Gage? Is it right at that limit or longer by one or two mils?

Where was the brass shoulder datum before firing and where was it post firing?

The measurement on the go gage is in between the measurement for the brass shot in chamber and after resizing, so I guess it’s ok?

 

[RegionRat]

Okay, so a brand new die.
I am going to assume a standard shell holder which is 0.125" from the top surface to the surface where the brass sits. Please verify this too. (ETA: if you are unclear on this, ask.)

The question is if this die + shell holder is meeting specifications, or if there is something else going on.

Let's check the shoulder datum length of your die-shell plate combination to see if it has the capability of bumping a shoulder to the nominal (Go-gage) reference length or below.

Using your shell holder in your hands not the press, see if you think the die touches the shell plate with the Go-Gage in place of a brass case.

In theory, a typical FL sizing die should not touch the shell plate on that Go-Gage otherwise it cannot bring brass to a value below the nominal shoulder datum length.

In other words, if the die can touch the shell plate on the Go-Gage, it isn't going to bump the shoulder back to the reference gage length.

If we fail this inspection, then we have more work to do for a path forward. If we pass this inspection, then we missed something in the story.

 

[josebd]

I don’t know if this will help but I took a picture with the go gage in the fl die, all the way in.
And a picture with it in the shell holder die all the way down
The chamber measures the same as the fired brass, after resizing its .001 longer?

 

[josebd]

Is there anything wrong with having a little resistance when closing the bolt on loaded ammo?this is a target rifle,I set the headspace at .002 on the new barrel

 

[RegionRat]

A die should not close on the Go-gage like that, unless the shell holder is too tall.

In theory, the chamber is set to just pass the Go-gage, (and also not to exceed a No-go gage).
I like to have beginners place a layer of thin tape on the back of the Go-gage to feel how it closes in their chamber. It gives them an idea of the clearance on the Go-gage, but it should be a matter of just a layer or two of very thin tape.

So, if you think about your die, and it shows closed on the Go-gage, then how can the die bring brass below the chambers that are very close to the Go-gage? It can't.

It should take a layer or two of tape between the shell holder and the die to equal the Go-gage. It is that thickness that allows the shoulder to be bumped. You are showing no gap, so your die/shell holder combination cannot size down the shoulder as it is.

Something is either wrong with the die or the shell holder. See if the height of the shell holder is more than 0.125" and if it is too tall, find one that isn't.

 

[josebd]

I shaved down the top of the shell holder, just a few thousandths, now I can push shoulder back

 

[Rocketvapor]

Just following along, as I think I might learn something here
Waiting on parts and I'll be setting up my first Savage bolt/
Of the things in this situation are the Go-Gage, the shell holder, the die, the brass, and the chamber (that you set to the Go-Gage +0.002"), and your measurement technique (never perfect).

RegionRat's comment on the Shell holder/die touching on the Go-Gage seems reasonable to me.
If they touch, the brass will come out longer than the Go-Gage.
Yours comes out +1 from your fired brass. Your fired brass is probably real close to the Go-Gage.

Now that you shaved the shell holder (cheapest way to get a little more bump) your sized brass will come out a little shorter than as fired. You wanted a little bump, right?

You based your chamber setting on the Go-Gage (+2), it's going to be your transfer standard to your reloading. Good or bad, it's the standard. Just don't oversize your brass now

 

[LVLAaron]

Is this new brass that you're firing for the first time?

 

[josebd]

Just following along, as I think I might learn something here
Waiting on parts and I'll be setting up my first Savage bolt/
Of the things in this situation are the Go-Gage, the shell holder, the die, the brass, and the chamber (that you set to the Go-Gage +0.002"), and your measurement technique (never perfect).

RegionRat's comment on the Shell holder/die touching on the Go-Gage seems reasonable to me.
If they touch, the brass will come out longer than the Go-Gage.
Yours comes out +1 from your fired brass. Your fired brass is probably real close to the Go-Gage.

Now that you shaved the shell holder (cheapest way to get a little more bump) your sized brass will come out a little shorter than as fired. You wanted a little bump, right?

You based your chamber setting on the Go-Gage (+2), it's going to be your transfer standard to your reloading. Good or bad, it's the standard. Just don't oversize your brass now

Yes I have .001-.002 bump now, and the neck is perfect on concentricity

 

[josebd]

Is this new brass that you're firing for the first time?

Yes but it really doesn’t matter the chamber is the same as the go gage

 

[josebd]

Yes but it really doesn’t matter the chamber is the same as the go gage

By that I mean a fired round measures the same as the go gage on the shoulder