Best 7/8 seating die

[lancexxx]

For a press die, What die produces less runout assuming everything else is good.

 

[chromatica]

Here is my silver bullet: LE Wilson bushing die and Forster Ultra-Micrometer seater die on a Forster Co-Ax press using Sinclair die-lock rings. These die lock rings are a near interference fit for the slot in the Co-Ax press and help to maximize concentricity. i can get runout of < .001 with this arrangement.

 

[ronemus]

I use custom Hornady non-bushing sizing dies with the neck diameter I prefer, and honed Forster dies are also a good option; I prefer the Hornady elliptical expander as I find it to be as good as using a mandrel and it eliminates one step in my process. Non-bushing dies produce much better runout in my experience. I second the vote for the Forster Ultra-micrometer seater - more durable and consistent than RCBS or Redding; seaters with a sliding sleeve give me better runout.

 

[jpjulian]

I use RCBS, Redding, Hornady, & Forster seaters. They all give good concentricity but the Redding's seating stem has cracked twice so only use it for lighter bullets and the Forster for heavier bullets in that caliber. Frankly, for my purposes, .002-.003" runout doesn't make a bit of difference.

 

[Fuj]

Don't turn your nose up at the LEE Dead length seater. I did a little
fooling with the floating nose punch to get lower on the ogive. They
are straight and consistent running out of an old RCBS Junior.....

 

[HTSmith]

These die lock rings are a near interference fit for the slot in the Co-Ax press

I thought the whole idea of the design was to allow the die to float?

 

[Kittitas George]

I have had the least amount of 'run out' with the Vickerman seating dies. The dies are caliber specific not case specific, so the 22 caliber die will load many different cases. According to information on this site, Vickerman dies are now sold by Nosler.

 

[TTE]

Non-bushing dies produce much better runout in my experience. I second the vote for the Forster Ultra-micrometer seater - more durable and consistent than RCBS or Redding; seaters with a sliding sleeve give me better runout.

I agree with this

 

[lancexxx]

what about the whidden

 

[Rtheurer]

to the OP this is 100% a loaded question because, like me, I didnt know what i didnt know. If you take 10 Exact same Sizing dies from the exact same Manufacture, you will get various degrees of run out on your brass. So you ask.. why would that be? because if you look and play around with your current dies and press you will see a fair amount of slop between the threads of the die and the Female threads of the press that is taken up with a silly lock coller when you tighten it up. It kinda needs to be, for MASS production stuff. same thing with the Dies themselves.
We did a test one time doing this exact test until we found a die that gave almost zero run out in the body and neck. After testing several Full Length dies, Finally a die that matched the Ram, Thread insert all that goes into lining up your cartridge. ( even your shellholder) Also... If that same die was rotated 180 degrees it might not match up just right. so which die gives you the least run out? that's a loaded question. My perfect die for one press might not be perfect in one of the other 6 press's i own.

Probably not what you wanted to hear i suppose.

 

[Gabe22BR]

Most accurate???

Newlon micro seater reamed w/ your reamer- stuck in a. arcko/hood press-

 

[Steve Donlon]

I have had the best results with the Redding Competition Seating dies. Never tried the Wilson but the sliding sleeve in the Redding die helps from what I've seen. I use these dies for every thing including my 45 acp.

 

[ISS]

Arbor Press? Wilson.
Other wise, I really like the Whidden brand. Send them three fired cases from your rifle, and they machine to match those cases.

 

[paperpuncher]

what about the whidden

I have a couple they work very well for me

 

[Murray Brook]

Don't turn your nose up at the LEE Dead length seater. I did a little
fooling with the floating nose punch to get lower on the ogive. They
are straight and consistent running out of an old RCBS Junior.....

The best seating die that comes in a standard die set. Very very close to the #'s I get with my Forster Ultra seater.

 

[Bc'z]

Off the shelf, non custom...
Redding hand down!

 

[Fast14riot]

Redding micrometer competition seater or Hornady custom if I have to use threaded seater dies. The Lee are also good.

 

[mudduck]

what about the whidden

I have two and like them but I’ve never checked runout from them

 

[neckturner]

For a press die, What die produces less runout assuming everything else is good.

SAC (Short Action Customs) "The" Seating Die and their Modular Sizing Die. After that, the Redding Competition dies are good.

 

[GunnyUSMC]

Short Action Customs modular sizing die with bushings. What I really like about this die is that the bushing sizes the neck and shoulder bump. cases sized with this die come out looking like new cases.

I have used Forster, Redding and LEWilson sizing dies. I became frustrated with these dies for a variety of reasons. In some cases the bushings would not size much more than half the neck. sometimes this was the design of the bushing itself and sometimes it was the die. the only die, other than the SAC Modular, that i could get to size the neck properly was a Redding neck sizing die that did not size the body but of course i had the companion FL sizing die to go with it.

In my experience I like having my whole neck sized to reduce runout.

Again, the SAC Modular sizing die bushing forms the case from the shoulder up, not just the neck. This die is a little pricey but oh well. The only nuance with this die is that it comes with shims to adjust the shoulder setback. I dont use the shims but instead use different sized case holders to adjust the shoulder setback. When possible, i do prefer full contact between the press and die, which is why i use different sized case holders to manage shoulder setback.

LE Wilson inline seating die with Arbor press is awesome.