Full length bussing die

[Brian o 23]

I could use some help with FL Bushing die please. I have a Redding FL sizing die but I thought of using a Fl bushing die but don't know where to start. Redding, Whidden or some other manufacturer.
My loaded rounds measure between 0.337" and 0.338"
Thanks
Brian

 

[ShtrRdy]

You would want to use a bushing of .335 or .336. However, measure the neck diameter of a fired case. If it's more than 0.341" you should resize the neck in two steps so you're not trying to resize the neck down too much in one step.

 

[Brian o 23]

You would want to use a bushing of .335 or .336. However, measure the neck diameter of a fired case. If it's more than 0.341" you should resize the neck in two steps so you're not trying to resize the neck down too much in one step.

I just measured 5 of my fired rounds all measured 0.3410" to 0.3415"could you explain more on this two step process.

 

[ShtrRdy]

Well, basically a downside to the neck bushing is that if you have to reduce the outside diameter of the neck "too much" it can cause some problems by reshaping the neck in undesirable ways.

I recently tried to use a .336 bushing to resize the neck on some .308 brass that has a fired case neck diameter of 0.344" . The neck ended up at 0.335" and had 0.005" of runout. When I first resize it with a .338 bushing followed by a .335 bushing the neck diameter ends up at 0.335" and less than 0.001" runout.

I've got a weird situation with the .336 bushing I have. When I first resize the neck with a .338 bushing the neck diameter becomes 0.337". Then when I use the .336 bushing the neck is still 0.337". I sent the bushing back to Redding and they said it is in spec.

In your case I would say use a .336 bushing and you're probably good.

 

[Edds]

Well, basically a downside to the neck bushing is that if you have to reduce the outside diameter of the neck "too much" it can cause some problems by reshaping the neck in undesirable ways.

I recently tried to use a .336 bushing to resize the neck on some .308 brass that has a fired case neck diameter of 0.344" . The neck ended up at 0.335" and had 0.005" of runout. When I first resize it with a .338 bushing followed by a .335 bushing the neck diameter ends up at 0.335" and less than 0.001" runout.

In your case I would say use a .336 bushing and you're probably good.

You had that issue with a FL bushing die?

 

[ShtrRdy]

You had that issue with a FL bushing die?

Yes. I added some more info to post #4. Please re-read.

 

[jcam]

My loaded rounds is at 0.338 & used a 0.336 bushing on my Redding type S bushing FL sizing die. I removed the decapping rod. So far this has worked for me.

 

[ShtrRdy]

My loaded rounds is at 0.338 & used a 0.336 bushing on my Redding type S bushing FL sizing die. I removed the decapping rod. So far this has worked for me.

What is the neck diameter of a fired case before resizing?

 

[jcam]

What is the neck diameter of a fired case before resizing?

0.342 - 0.343

 

[Brian o 23]

Well, basically a downside to the neck bushing is that if you have to reduce the outside diameter of the neck "too much" it can cause some problems by reshaping the neck in undesirable ways.

I recently tried to use a .336 bushing to resize the neck on some .308 brass that has a fired case neck diameter of 0.344" . The neck ended up at 0.335" and had 0.005" of runout. When I first resize it with a .338 bushing followed by a .335 bushing the neck diameter ends up at 0.335" and less than 0.001" runout.

I've got a weird situation with the .336 bushing I have. When I first resize the neck with a .338 bushing the neck diameter becomes 0.337". Then when I use the .336 bushing the neck is still 0.337". I sent the bushing back to Redding and they said it is in spec.

In your case I would say use a .336 bushing and you're probably good.

Thanks

 

[ShtrRdy]

0.342 - 0.343

Did you measure the runout on the neck after doing the resizing?

 

[jcam]

Did you measure the runout on the neck after doing the resizing?

No runout measurements yet. Still saving up for either a redding or a hornady case neck gauge measuring tool.