Stevequad
Stevequad
15 posts
Joined January 2018

Case not centered in Decapping die

I use a Lee universal decapper die, with Squirrel Daddy pins. Just bent another one, and while looking for the cause, I found that the case, 223 in this instance, was not centered going into the die. The decapping pin is centered in the die, and the case is all the way into the shell plate.
I removed my tool head, and put the regular loading toolhead in, with sizing, powder, dropper and seating dies. Checking the sizing die, the 223 case is still off center, but when it gets to the seating die, it is perfectly centered. Has anyone had this issue before? The case looks slightly cocked in the photos, but I think that is just the camera tilt. The shell plate is as tight as I can get it, and still spin. No debris on the shell plate, or base. I am stumped. See photos at:
https://www.smugmug.com/gallery/n-B9RsTT/
dillon
Administrator
dillon
3,222 posts
Joined July 2007

RE: Case not centered in Decapping die

Does this happen using every position in the shellplate, or only one? If you push down on the edge of the shellplate at station 1 does it rock? Same test at station 4?
We do recommend snugging the die lock ring with a case up in the die. This helps center the die in the toolhead.
Stevequad
Stevequad
15 posts
Joined January 2018

RE: Case not centered in Decapping die

I did the wobble test, and station 1 was solid, but station 4 had .005 wobble. I tightened it up, and could not find any more movement. Readjusted the die with the case in it, as I always do, and it seems much better. I can still see the 223 shoulder hit one side of the die slightly as it enters the die. Much better though.
Thanks for the help.
Steve
dillon
Administrator
dillon
3,222 posts
Joined July 2007

RE: Case not centered in Decapping die

To have a case shoulder touch one side of the die isn't unusual. All it takes is a small amount of rim deformation, usually caused by extraction, to make the case tilt slightly in the shellplate.
cptchris03
cptchris03
15 posts
Joined May 2013

RE: Case not centered in Decapping die

I have a similar problem. I use a Lee universal de-capping die with a stock pin in my loading tool head just to remove the corn cob from the flash hole. My brass is also not centered an jams almost every piece.

One thing I did to help is I removed the pin from the die and ground a taper on the thicker part of the shaft to the base of where the thinner pin is. I then polished the taper smooth.

This guides the brass to be more centered and works about 95% of the time. I still have a jam now and then and tap the brass into position with my finger.

Hope this helps.
Joe
Joe
128 posts
Joined September 2007

RE: Case not centered in Decapping die

I usually have an issue with .204 Ruger cases not centering on the decapping die. Since they're nearly the same as the .223 Rem case, I don't make any changes to the shellplate, locator, or primer cups. I only need to change the toolhead. Even when I push the handle as far as I can to seat the case in station 1, sometimes it still doesn't center, and I end up with a broken decapping pin. Not hard to fix, just frustrating. I've tried adjusting the case insert slide and cam, as well as adjusting the camming pin. sometimes I can go through 40-50 cases before the problem occurs. I've cleaned the shellplate, as well, as sometimes lube does stick to the crevice on the shellplate. I didn't think there was much difference between the bases of the .204 and the .223, since they use the same shellplate and pins.