223 Sizing Dies?

[cro789]

What is considered the best sizing die for the best accuracy and the lowest run out?

 

[MarinePMI]

The one you know how to set up and run...

Not being a smart ass here, but it really depends on a lot of variables, mostly based on the user's knowledge in how to run whatever type, brand or style of die they are running.

 

[cro789]

I have run from RCBS to Mighty Armory and do a FL and bump the shoulder back .001 to 003.

 

[Eurodriver]

I use an RCBS SB die to FL size, an M die to expand and an RCBS to seat. I do ok.

 

[Steel head]

Redding body die and Lee Collet are what I use.

 

[Sheldon N]

What is considered the best sizing die for the best accuracy and the lowest run out?

This isn't a which die brand question. You're going to get a bunch of answers that are "I own this die and it's awesome". What really matters are a few basic things...

1. Does this die match my chamber and my brass so that when I size the case with appropriate shoulder bump that the rest of the case is proper dimensions to fit in my chamber without any part being oversized or overworked? That totally depends on your brass, your chamber, and your process.

2. Is this type of die the style that meets my needs? Full length non-bushing can give straighter ammo (esp when used with a separate mandrel or collet die), but is less flexible. Bushing dies give control over neck tension which can fine tune accuracy... but do you intend to test neck tension? And is straighter ammo or ideal neck tension going to give better results? There's no definitive answer unless you test those variables in your specific gun.

3. Is the die machined with adquate quality and finishing? The answer is yes for pretty much all dies.


So IMO it's a question of die fit, and a question of process/workflow preference.

 

[Bwells]

This isn't a which die brand question. You're going to get a bunch of answers that are "I own this die and it's awesome". What really matters are a few basic things...

1. Does this die match my chamber and my brass so that when I size the case with appropriate shoulder bump that the rest of the case is proper dimensions to fit in my chamber without any part being oversized or overworked? That totally depends on your brass, your chamber, and your process.

2. Is this type of die the style that meets my needs? Full length non-bushing can give straighter ammo (esp when used with a separate mandrel or collet die), but is less flexible. Bushing dies give control over neck tension which can fine tune accuracy... but do you intend to test neck tension? And is straighter ammo or ideal neck tension going to give better results? There's no definitive answer unless you test those variables in your specific gun.

3. Is the die machined with adquate quality and finishing? The answer is yes for pretty much all dies.


So IMO it's a question of die fit, and a question of process/workflow preference.

Great advise.