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1/12/2009 9:15:39 AM EDT
Ok I just started sizing some 223 range brass and I keep denting the shoulder I set up the die the way it says with the paper work it came with. Im using a lee chalenger press and a redding full length sizing die. the brass is a mix of winchester and remington peters .223 . Do i need to trim before sizing? there is nothing protuding inside the die.

1/12/2009 9:19:23 AM EDT
[#1]
Those look like lube dents to me.  What kind of case lube are you using, and how much?
1/12/2009 9:28:55 AM EDT
[#2]
Lube the cases.  With LEE lube, apply the barest thin coat.

Trim after sizing since the sizing operation changes the shape, including the length, of the case.
1/12/2009 12:53:58 PM EDT
[#3]
ok well then my bad i guess i was using mobil 1 supersyn 5-20 i figured if it works for my truck why not. I guess i was wrong. I'll pick up some lee lube to see if that takes care of it. thanks for the help

I would have never thought that would be from using wrong  or to much oil
1/12/2009 2:36:02 PM EDT
[#4]
Quoted:
ok well then my bad i guess i was using mobil 1 supersyn 5-20 i figured if it works for my truck why not. I guess i was wrong.


I've sized over 1000 cases in a pinch w/ the same oil you used.  Although using reloading specific lube works MUCH better, it can be done with synthetic motor oil.  You were just using way too much.  Don't dip your cases in them.  Just barely dip your left index finger in the oil and smear it on your thumb and middle finger.  Then smear your oily fingers on the case as you put it in the shell holder.  I wear a nitrile glove when I do this.  

I do find that the Lee lube works very well.  I use it the same way I use the motor oil.  Nitrile glove and smear as I put it in the shell holder.  

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