Which is the most important ?

powdergun

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Reloading with two dies involves the resizing step and then seating the bullet.
( All other steps as well of course)

Which of the two is more crucial to accuracy. Resizing or seating the bullet ?

Reason for asking is I have a new redding coming and I would like to keep my lyman set up to do one of the steps. My hope is to use the redding for the more crucial step.

I prefer the two single stage presses as I am not a big fan of turning turret presses.
 
Resizing or seating the bullet
They're both very important. All the brass must be the same length. When seating the bullet, the neck tension must feel the same. All the bullets must be seated the same distance from the ogive to the lands or into the lands. Sure hope you ordered the neck bushing die, an expander ball is not your friend.
 
I will guess that one could not measure, or detect, any difference between the Redding and the Lyman sizing die. Eack will be made to SAAMI standards. The luck of the draw will determine whether you get one, either brand, that has been made shortly after the reaming equipment was set up, or whether you got one made just before the factory discarded their used reamers and put in new ones.
Ditto for the seating die, also, unless the Redding is a special seating die, of some type.
 
I am guessing you are keeping your current dies and are adding a Redding press to you bench where you are planning on using one press for sizing and the other for seating.


The only way to tell which is the more accurate press is to try your dies in each of the presses and check the finished ammo with a concentricity gauge.

I personally don't think that you will see much - if any - difference between the two presses as far as accuracy goes.
 
Adding another will depnds , (what were you doing wrong before-----?) If all were good ,I don't see you can do much better no matter how many you put on your table as long as all are same or almost same
 
Considering it takes less than a minute to change out dies I would use the Redding for both. If you just have to split them up then I'd use the Redding for seating.
 
The Co-ax press uses the principal of the case floating in the shell holder and finding it's own centering in the dies, similar to how I set up bullet sizing nose punches in lube/sizers. The self centering case should help ensure necks are sized "in line" with the case, same for bullet seating, using the floating shell holder and precision seating die.
 
I'm of the opinion that straight, concentric seating is far more important to accuracy than sizing of the brass.

That statement assumes a few important things though...
 
Guess I should have read the OP with more care.
'Boo is right on the money:

I am guessing you are keeping your current dies and are adding a Redding press to you bench where you are planning on using one press for sizing and the other for seating.


The only way to tell which is the more accurate press is to try your dies in each of the presses and check the finished ammo with a concentricity gauge.

I personally don't think that you will see much - if any - difference between the two presses as far as accuracy goes.
 
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