6x47L resize issues

[Hunter2678]

So Im using the usual forester FL 6x47L die on my brass and after necking down to 6mm every neck of the brass that is run through the die comes out bent. Ive adjusted the die, Ive tried different case lubes but they all come out the same, bent. they'll all straighten out after a couple reloads but I want to avoid that obviously, what am I missing?

 

[JRS]

What do you mean by "bent"?

 

[Hunter2678]

Crooked,bent, not concentric , too much runout

 

[SG4247]

Is there a bushing of the appropriate size, in the die to keep the neck from tilting? May be stress in the neck/shoulder from the neck sizing operation done earlier.

Just a thought.

 

[JRS]

He shouldn't use a bushing die to neck the cases down.

 

[SG4247]

Not what I said.

A bushing of the same OD of the sized neck, just for stability.

Follow me?

 

[Hunter2678]

Sg the resizing step is what's causing the run out. You understand that I'm sizing down 6.5 x47 brass to 6mm right?

 

[SG4247]

Yep, own both calibers myself.

 

[Bert]

I removed the sizing ball. And then expand it with a K+M mandrel in a second operation. The necks stay straight then. The brass will look hour glassed after just sizing the neck down.

 

[JRS]

I have sized a couple of hundred in the Forster full length die and never had a problem.

 

[Hunter2678]

Bert, I operate the forester without the decapping pin assemblyas well.

 

[Patch700]

Honestly I don't think you have a problem , rather I should say that what you are seeing is somewhat normal.

Put it to you this way , if you were using a bushing die and tried to size a neck from say .296" down to .288" you would most likely see some type of runout induced due to the fact that you are reducing beyond the magical number of .005"

If I am reading your situation correct you are taking 6.5x47 Lapua brass and taking it down in one step to 6mm.... Nothing wrong with doing that and yes there would be a fair amount of runout induced and yes that would be ok.

If you have crooked necks AFTER they have been fire formed and sized in the appropriate die THEN you would have an issue to deal with.

 

[Bert]

Then are you running some thing thru them to expand the neck after they get sized down to 6mm? And like stated after they are shot are they concentric?

 

[CHROME]

I use the Redding or the Forrester Bushing die with the ball removed. Resize the case, then use a expander mandrel (KM or PMA) works perfect. Make sure you are using lube when you "downsize and expand" very important in my opinion. Then I turn my necks, again either KM or PMA neck turner.

 

[Hunter2678]

Then are you running some thing thru them to expand the neck after they get sized down to 6mm? And like stated after they are shot are they concentric?

Bert, Yeah after I run my brass through the forster FL resizer I run them lubed through a 21st century 6mm mandrel so I can then more easily turn the necks down a half thou or so just to remove the high spots.

 

[Hunter2678]

Honestly I don't think you have a problem , rather I should say that what you are seeing is somewhat normal.

Put it to you this way , if you were using a bushing die and tried to size a neck from say .296" down to .288" you would most likely see some type of runout induced due to the fact that you are reducing beyond the magical number of .005"

If I am reading your situation correct you are taking 6.5x47 Lapua brass and taking it down in one step to 6mm.... Nothing wrong with doing that and yes there would be a fair amount of runout induced and yes that would be ok.

If you have crooked necks AFTER they have been fire formed and sized in the appropriate die THEN you would have an issue to deal with.

Patch I think thats exactly what Im running into..I thought for a long time I was missing a resize step because I never heard anyone talk about how their brass was being bent during resizing the 6.5 necks down to the 6mm. They do straighten out after the first firing. I was just hoping that I could do something different to make them straight right out of the gate.

 

[Patch700]

Yes it's one of those things a person sometimes has to deal with... I suppose you could try doing it with a bushing neck size die but in all honesty this would be a case where the juice ain't worth the squeeze. Not to mention the issues with not getting the whole neck sized properly.

Could try putting a more aggressive outer chamfer on the necks and then try sizing them in two steps with the first only sizing about a quarter of the neck and check for runout before running them through the second time.

Make sure the shell holder isn't being held too tight to the ram by removing the retaining clip and replace it with an O-ring that allows the shell holder to move to and fro.

As long as you are not seeing these problems after the fired brass has been sized I would park the concentricity gauge until after they were fired.

Good luck.

 

[Raptor]

Just curious, does the excessive run out of .007 to .010 have an affect on your accuracy??? I made some 6.5 Creedmoor cases out of 308 brass and this is what I have run into also. Some will come out with only a few thousands run out while others are just terrible. Thanks guys!!

 

[fredo]

I'm having a 6x47L built and have all my components in order.
Spoke to a friend of mine about his procedure for making brass. He uses a Type S FL bushing die with a floating carbide expander ball (6mm) installed. Normally, I use bushing dies without an expander at all. Friend said he learned of that technique from his 'smith and its said to help with making fairly straight/usable brass in one pass.
Can't confirm that it works, but I trust his judgement enough to try this for myself when the time comes...

 

[boltfluter]

Try sizing using the seating die as an intermediate step before FL die. Works great for me. Just a thought. ;D

Regards, Paul

www.boltfluting.com