josebd
Silver $$ Contributor
I don't shoot when there is wind
Max run out on neck after resizing?
- Thread starter josebd
- Start date
Do you guys that turn the necks on your cases do it for the purpose of:
1. reducing run out
2. because the chamber dimensions require it
3. both
4. some other reason
1. reducing run out
2. because the chamber dimensions require it
3. both
4. some other reason
snert
Silver $$ Contributor
only my benchrest cases. in the pursuit of consistent controlled neck tension. one of many things i have tried that actually makes a difference.
does reduce runout as a side note. easy to understand why, especially if you use a bushing die, after you measure neck thickness variations on a few 100 cases. Even lapua cases vary in thickness .0015 or more in different points around the circumference of a single case.
Last edited:
josebd
Silver $$ Contributor
And yes
I shoot early mornings, usually no wind
snert
Silver $$ Contributor
No windflags, daisy wheels or probes i assume?
how do you shoot thru watering eyes ??
Dusty Stevens
Shiner
Theres only no wind if you dont have wind flags. If you got just one vane type and put it in your backyard to study while drinking your morning coffee youll probably throw the cup at the flag for lying
Ledd Slinger
Silver $$ Contributor
*Control neck tension
*Keeping donuts at bay
*Runout
*And to choose amount of desired clearance in a custom spec tight neck chamber.
Josebd, here is a quick test you can do easy enough. Remove the expander from the die and set it up and full length size a case. Check the neck for run out...there should be zero. If there is run out give Forester a call and they will have you send the die back for repair or replacement. If it's zero reinstall the expander, but leave it loose. Resize another case but stop when you are coming out of the die right when the expander is in the neck. Tighten the expander and re-check for run out. It should again be zero {if the neck is concentric to start with}. If not, try again, if it still wont zero up call Forester, they will correct or replace the die. Forester dies are a little different in that the expander is up in the die further than most others and it kind of starts into the neck as soon as the neck get out of that part of the die...if that makes any sense. You probably will still see some bullet run out, but many reloading companies say and many others agree that .003" bullet run out is as good as zero on the target.
Not many can argue with Tony Boyer....if you read his book he doesn't have much to say about bullet run out, as if it is never a problem. Then again the average shooter is not jamming his bullets hard into the rifling to begin with either.
Not many can argue with Tony Boyer....if you read his book he doesn't have much to say about bullet run out, as if it is never a problem. Then again the average shooter is not jamming his bullets hard into the rifling to begin with either.
I get made fun of all the time by jealous shooters for having my own range....now I can honestly say, "But I don't have pet elk at my range"!!!!
josebd
Silver $$ Contributor
I have .001 runout without expander ball
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.
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.
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.
jepp2
Gold $$ Contributor
Dusty Stevens
Shiner
Thatll straighten out with one good bulletless fireform load
jepp2
Gold $$ Contributor
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
Shiner
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 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.
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