Max run out on neck after resizing?

[Richard Coody]

things that i have found to reduce runout and improve neck tension consistency.

the tool you use to measure concentricity makes a lot of difference in the results you obtain.

if you are below .003 then you are just doing this to see if you can. BTDT

measure at each step in the reloading process to identify where runout is being introduced. fired brass will be the best it will ever be

if sizing it could be anything from the press to your procedure to the dies you use. custom dies have the greatest potential to eliminate runout. if you have good dies then you will have to look elsewhere.

if it is seating then buy you a wilson seater and an arbor press.

neck turning. uniform thickness for the entire circumference of the neck from mouth to shoulder.

using an expander mandrel for final neck tension adjustment. moves all remaning imperfections to the outside of the neck unlike a bushing die.

using a 21st century hydro press for bullet seating will quickly tell the tale on the consistency of your procedure.

 

[msinc]

I have .001 runout without expander ball

It should absolutely be zero with no expander ball installed. Just to be clear...you actually removed it from the die body and it's not just loose and wound down, correct??? If so and you are getting runout then I would suggest you give Forester a call and talk to them. They are first rate when it comes to customer service. If the die is bad they will give you a new one whether you bought the die new or not.
It's best if you are prepared to have the call when you can be right in front of your press and die, they will talk you thru the whole test again just to make sure.

FYI if the expander ball is to shallow you can destroy the brass necks, I have pictures
J

Not sure what you mean by "shallow"...Forester dies are different from others in that the die is designed to have the expander ball just below the neck so that it starts to expand soon after the case comes loose and the neck clears on retraction or the "down stroke" of the press. Most dies have it low and down near the decapping pin. Again, Forester dies are different.

 

[JFrank]

It should absolutely be zero with no expander ball installed. Just to be clear...you actually removed it from the die body and it's not just loose and wound down, correct??? If so and you are getting runout then I would suggest you give Forester a call and talk to them. They are first rate when it comes to customer service. If the die is bad they will give you a new one whether you bought the die new or not.
It's best if you are prepared to have the call when you can be right in front of your press and die, they will talk you thru the whole test again just to make sure.



Not sure what you mean by "shallow"...Forester dies are different from others in that the die is designed to have the expander ball just below the neck so that it starts to expand soon after the case comes loose and the neck clears on retraction or the "down stroke" of the press. Most dies have it low and down near the decapping pin. Again, Forester dies are different.

By shallow I mean that I inadvertently had the expander ball set to high and crushed the necks of a few brass before I discovered what was the issue

 

[jepp2]

Would .002 or less be Ok?

Written for you. https://www.sinclairintl.com/guntech/bullet-concentricity-related-issues/detail.htm?lid=16572

 

[Dusty Stevens]

View attachment 1051803
By shallow I mean that I inadvertently had the expander ball set to high and crushed the necks of a few brass before I discovered what was the issue

Thatll straighten out with one good bulletless fireform load

 

[JFrank]

Thatll straighten out with one good bulletless fireform load

I'd say about 31 gr of RL-15 behind a 107 should do it!

 

[jepp2]

By shallow I mean that I inadvertently had the expander ball set to high and crushed the necks of a few brass before I discovered what was the issue

I also set my expander high, so it starts to pass through the die neck just AFTER the neck has passed below the neck sizing portion of the FL sizing die. And I admit, I have also collapsed a neck in my time.

But I don't have any Forster dies. I do it on my other dies. Sometimes I have to thread the decapping pin rod to allow the expander to be set high enough.

 

[Dusty Stevens]

Talking about runout and expander balls in the same sentence is handy to keep them associated with each other since they go hand in hand usually.

 

[JFrank]

Talking about runout and expander balls in the same sentence is handy to keep them associated with each other since they go hand in hand usually.

I'm done with mine
If fact that's probably the biggest reason my 308 loads went sour.

 

[Stan Taylor]

I was going to shoot a 600 yd match tommorow but I got about .001 thousands run out in my loaded rounds I guess I will pull the bullet an start over.

 

[josebd]

That’s terrible,how did you do that??

 

[Stan Taylor]

I was going to shoot a 600 yd match tommorow but I got about .001 thousands run out in my loaded rounds I guess I will pull the bullet an start over.[/

I was going to shoot a 600 yd match tommorow but I got about .001 thousands run out in my loaded rounds I guess I will pull the bullet an start over.

We'll I changed my my mind on pulling bullets didn't turn out to bad.

 

[retired]

maybe you should ask jim if .001 is ok ?
yes i will shoot .001,, i said i would not shoot .002.
and i seem to score better than i group.
the good news is you were out shooting!

We'll I changed my my mind on pulling bullets didn't turn out to bad.

 

[Stan Taylor]

maybe you should ask jim if .001 is ok ?
yes i will shoot .001,, i said i would not shoot .002.
and i seem to score better than i group.
the good news is you were out shooting!

We'll thanks Jim who.

 

[retired]

i hope that was humor....the only jim(james) on the results sheet.
you know the one that came in 1st overall in heavy gun.
it's hard to hide humor in flat black and white type

We'll thanks Jim who.

 

[Stan Taylor]

i hope that was humor....the only jim(james) on the results sheet.
you know the one that came in 1st overall in heavy gun.
it's hard to id humor in flat black and white type

My bad I didn't read between the lines I have only one thing to say the only thing bad about Jim ohara that I can say is he's a Yankee but he can't help that there is a lot of folks on the internet that don't take Jim seriously when he post here but I have shot a lot with Jim ohara you better have your A game a going when you go to to the line against him if your not on your game he will clean your clock he shot very well today he won light gun score and 2gun overall if he has a good tune your in trouble.PS

 

[johara1]

Thanks Stan but I found never say it is good enough, accept nothing but as perfect as you can. You must be anal...... lol.... jim

 

[Stan Taylor]

Thanks Stan but I found never say it is good enough, accept nothing but as perfect as you can. You must be anal...... lol.... jim

Congratulations again marine hoorah.