284 Die too tight at Body/Shoulder... now what?

[pat fulghum]

I have a 284 with a .315 neck chamber, I must turn my necks to .013 ot get the .004 clearance that .284's like.

Coming out of the chamber my cases measure .475 at the body/shoulder junction; this is normal.

I have a Foster FL sizer (non-bushing) that will leave it at .473... great, but the necks barely have .001 tension.

I have a reading Type S with Neck bushing, but it really squeezes the body/shoulder to .468 (almost .007 reduction) and will leave a little burn on the top of the body.
I called Redding and they said that their dies have to work for minimum chamber, and that much is normal.. I feel like that much sizing is too much... am I wrong?

Short of going to custom dies and putting the gun on the shelf for 8 weeks..... any thoughts?

I could use the Forster to body size and bump and then come back with a Lee collet die, but Lee doesn't make one for win 284.

I'm open to suggestions.

 

[boltfluter]

Do you happen to have a bushing die that is shorter than the .284 case that would work just for sizing the neck? Possibly have someone modify your Forester die to take bushings. Just a couple of random thoughts.

Paul

www.boltfluting.com

 

[Brians356]

Possibly have someone modify your Forester die to take bushings.

"Forster".
-

 

[ballisticdaddy]

I have a .284 Win with a .316 chamber and I use the Redding 3 piece die set with the proper neck die bushing. I believe any standard die set will be to SAMI specs and with your neck turned down it will result in minimal neck tension as you have experienced.

 

[Alex Wheeler]

Call Whidden and see what his shoulder diameter is. I have had good luck with the dies I have used from him.

 

[Brians356]

Something doesn't add up. The SAAMI Min Chamber diameter at the body/shoulder is .4759 (+.002). It's hard to imagine the Redding die leaving the case .468 (BTW that's only .005 different than the Forster, not .007.) I have a set of pin gages up to 1/2 in., I'd sure be probing those two dies, just for fun.

How far do the two dies each set the shoulder back? That's critical missing information here for me. Do you happen to have a set of Redding Competition Shell Holders?
-

 

[wricksmith]

I could use the Forster to body size and bump and then come back with a Lee collet die, but Lee doesn't make one for win 284.

That's what I do. Lee will make you a custom collet neck die for$70.

 

[bblackwell]

Pat,

What does a loaded round measure? The reason I ask is , if your loaded rounds are .310 or less you can turn your cases a little thicker say 13.25-13.50 and gain a little more neck tension and still hold your .004 plus clearance with your Forster die.

I have a .315 nk on my .284 and also trim to .013 and use the Forster FL non-bushing die and make small adjustments in neck thickness to get the right tension depending on which bullet i'm using at the time. You just have to measure it out with a good micrometer and use trial and error.

 

[Ringostar]

You don't need a custom 284 collet die. You can use the 7x57 collet die to neck size the 284 case. Just add one washer on top of the shell holder so that the collet clears the shoulder.

 

[avidflyer]

That's what I do. Lee will make you a custom collet neck die for$70.

Last one I got was around $100 but made it no problem

 

[Keith Glasscock]

Pat,

My Redding dies make the shoulder .473". I think Redding needs to replace that die.

I have a spare type S here if you want to give it a try.

 

[Brians356]

I have a 284 with a .315 neck chamber, I must turn my necks to .013 ot get the .004 clearance that .284's like.

Coming out of the chamber my cases measure .475 at the body/shoulder junction; this is normal.

I have a Foster FL sizer (non-bushing) that will leave it at .473... great, but the necks barely have .001 tension.

I have a reading Type S with Neck bushing, but it really squeezes the body/shoulder to .468 (almost .007 reduction) and will leave a little burn on the top of the body.
I called Redding and they said that their dies have to work for minimum chamber, and that much is normal.. I feel like that much sizing is too much... am I wrong?

Short of going to custom dies and putting the gun on the shelf for 8 weeks..... any thoughts?

I could use the Forster to body size and bump and then come back with a Lee collet die, but Lee doesn't make one for win 284.

I'm open to suggestions.

How far does the Redding S Die set the shoulder back?

Do you happen to have a set of Redding Competition Shell Holders?
-

 

[pat fulghum]

I verified that chamber is .3158 with a Cerrosafe casting.



Fired brass is .3135, I anneal every time so there should be minimal spring back.

@brians356, I'm bumping the shoulder back .002 with both dies. This is measured using a .375 hornady headspace gauge.

I went and borrowed @Keith Glasscock 's Redding S die and his does make the shoulder .473 and no burr to speak of.
Where my Type S would press it to .468 and put a burr on it.
So there is a big difference in the Redding dies... hmmmm. I will ship it back with a couple of sized / fired cases.

@Alex Wheeler , I will call Whidden on Monday and get his standard dimension., I do have several FL dies from him that I really like.

What I was concerned about is the burr that MY Redding die was putting on the case when I tried to use bushing die to play with tension.

Here is a highly exaggerated drawing of the burr.




Either way, I think I have convinced myself that I do have enough clearance in the chamber with a .311 loaded round made with .0132 turned necks.
Coming out of the Forster die (with or without expander ball) I get .3088 so I do have about .002" tension, I just need to make sure I control the neck thickness well.

I will just go load and shoot it....enough futzing around.

Thanks for all the help folks!

- pat

 

[Brians356]

I verified that chamber is .3158 with a Cerrosafe casting.

View attachment 1018445

Fired brass is .3135, I anneal every time so there should be minimal spring back.

@brians356, I'm bumping the shoulder back .002 with both dies. This is measured using a .375 hornady headspace gauge.

I went and borrowed @Keith Glasscock 's Redding S die and his does make the shoulder .473 and no burr to speak of.
Where my Type S would press it to .468 and put a burr on it.
So there is a big difference in the Redding dies... hmmmm. I will ship it back with a couple of sized / fired cases.

@Alex Wheeler , I will call Whidden on Monday and get his standard dimension., I do have several FL dies from him that I really like.

What I was concerned about is the burr that MY Redding die was putting on the case when I tried to use bushing die to play with tension.

Here is a highly exaggerated drawing of the burr.

View attachment 1018441


Either way, I think I have convinced myself that I do have enough clearance in the chamber with a .311 loaded round made with .0132 turned necks.
Coming out of the Forster die (with or without expander ball) I get .3088 so I do have about .002" tension, I just need to make sure I control the neck thickness well.

I will just go load and shoot it....enough futzing around.

Thanks for all the help folks!

- pat

Oh! You said "burn" on the body in your OP, not "burr". That would have indicated a defective die immediately, if not sooner.
-