Neck bushing ?

[savageshooter86]

Ok so finally got some bushing to try in my Whidden Die. Loaded rounds neck is 336. So I borrowed a 334 and a 335 Redding TN bushing. This is on neck turned Lapua 1x fired brass. On the 334 bushing necks are coming out 332 and on the 335 bushing necks are coming out 333. I tried to measure inside the bushing to see what the actual diameter is on each but using a caliper is only so accurate. But appears to be very close.

So how are my necks getting sized smaller?

Spring back would give me larger readings than that, or at least me and A J shooter think so

 

[Keith Glasscock]

I've found that I get all kinds of weird results if I have to reduce the neck dia too much.

What is the fired dia?

 

[savageshooter86]

344

 

[dmickey]

You might try flipping the bushings over and see what you get.

 

[savageshooter86]

Tried that. Same thing. Unless the bushing is 2 thous smaller than both bushings are labeled. But them again I checked and they seemed close to the size

 

[savageshooter86]

is Redding that bad about bushing tolerances?

Anyone else have any ideas here?

 

[CatShooter]

Ok so finally got some bushing to try in my Whidden Die. Loaded rounds neck is 336. So I borrowed a 334 and a 335 Redding TN bushing. This is on neck turned Lapua 1x fired brass. On the 334 bushing necks are coming out 332 and on the 335 bushing necks are coming out 333. I tried to measure inside the bushing to see what the actual diameter is on each but using a caliper is only so accurate. But appears to be very close.

So how are my necks getting sized smaller?

Spring back would give me larger readings than that, or at least me and A J shooter think so

There is nothing wrong with the bushing - it is the right diameter. If you size the neck and make a large change, the neck will over shoot the bushing size.

There is something about it in the catalogue, or there used to be - I haven't seen a catalogue for a while.

It is caused by the shape of the mouth of the bushing - it you reshape it, the problem goes away.

 

[savageshooter86]

well I ordered a 339 bushing and am going to try 2 step process. I hope this fixes it

 

[mikecr]

It's right, or I should say normal. 10thou is a lot of neck sizing.
When you downsize more than ~5thou there is an overshooting/over-angle condition.
Trial & error from there.

 

[Milo 2.0]

It's right, or I should say normal. 10thou is a lot of neck sizing.
When you downsize more than ~5thou there is an overshooting/over-angle condition.
Trial & error from there.

I built a 6BR this spring, my first, messed up badly on barrel length, went 22". I was going to order dies, so I called the smith, he had some 88gr Bergers and a case. I told him to put a dummy round together and get measurements for a bushing die, first number out his mouth was, .263, then 264, 265, and couple more. Well, I just took it for granted that the .263 number was the .002" I needed, I wasn't about to spend another 80 bucks on top of the 175.00 I was about to spend.
Well I get the gun and the dummy round, I measure it, .271", oh, now I'm pissed. So I make my own, it measures .2685". ok, I get a .266 coming this way. I run close to 400 cases through the die, but when seating notice there's no neck tension what so ever, my Redding comp die will just turn the bullet down into the case with the 266. So I sell the thing on here, now all I have left is the .263, so I size my 200 cases, notice a distinct donut forming, but not the angle, it may be there, but not visible to my eye. So I load some ammo, definite neck tension now, just at first entry though, so I load 50 and take them out to shoot to see what I messed up. Shot a nifty quick fire group of 2" at 500 yards, shot at just about all ranges out to 1100 yards, no change of impact, no increased pressures, it just settled in where it was before.

I'm going to keep running the .263", even if it's .0055" neck tension, maybe just anneal more often to keep the necks from cracking.

 

[savageshooter86]

I will repost my results once I get the 339 bushing and neck size only first. Then will try the "right" bushing size and see what I get. Loaded round is 336 and I am wanting 2 thous neck tension. Might even try 3 thous again. Also in future would also consider 1 thous neck tension to see what happens

 

[savageshooter86]

Update

Got my 339 bushing. Sized a couple cases and was getting roughly 3385. Then proceeded to use the 335 bushing and was getting 334. So it is close now

Can someone tell me the method for two step neck sizing? I will use the 339 bushing in a neck size only die first. Then follow that with FL Bushing die with my final desired bushing. But how much of the neck should I size on the first step? All of it then size only about 70% on the final step?

Thanks for all who helped out with thoughts

 

[mikecr]

It seems like you could have gone to a 336 bushing and been done with it in one step.
As far as how much of the neck to size, I don't believe you can size 100% of neck length with a standard bushing die. No good reason to.
Just partial neck size to grip bullet bearing.

 

[savageshooter86]

Well I tried that first and it was overdoing the bushing and sizing 2 thous below bussing size. I have a fired case neck of 344 and needing to size all the way down to 334(2 thous tension)

 

[savageshooter86]

Is my only option for a bushing neck size only die the Redding Type S die?

 

[mikecr]

You originally posted;

the 334 bushing necks are coming out 332 and on the 335 bushing necks are coming out 333

Well the next step would be a 336 bushing to reach goal of .334, right?

Is my only option for a bushing neck size only die the Redding Type S die?

There is atleast Wilson,, which I use. Whole lot cheaper

 

[tenring]

Send 3 fired cases and $75.00 to Harrel brothers and you will have a custom F/L sizer die that works well in about 10 days.

 

[savageshooter86]

I hate I have to buy another die to make this work for this chamber (factory size 335 chamber). This is a Whidden full length bushing die.

I may call and see if he will make me a neck die our a custom size and then different expander sizes to get my desired neck tension

 

[BaconFat]

Is my only option for a bushing neck size only die the Redding Type S die?

I use Forster neck bushing dies. You can buy a die that comes with .336, .334 and .332 bushings. I also have the Redding Type S which as it has worked out is gathering dust.

 

[savageshooter86]

any reason for that? Or just decided to use the Forster instead?

Maybe you would want some of that dust cleaned off the Redding die? ;D


After a few on here suggested what my issue was, I also found on Redding's website about the issue and also found the same info G Salazar wrote about. Trying to size 10 thous +, the neck was over shooting the bushing and sizing well under desired neck size. So verifies the info I found online

Only reason I went with FL die was I cleaned up the necks and wanted to try different neck tensions