223 Rem Concentricity issues, need help.

I cast some Lyman 225415's (55 gr), sized them in a new Lee .224 die. They checked a little big, but OK. After seating, they looked a bit 'funny'. When I checked them with my Sinclair concentricity gauge they averaged a whopping .016 TIR ! The cases check OK at the shoulder and the neck. Neck wall thickness varies only slightly. I made some dummies with another brand of brass, same results. I used a 'M' die to expand and all went well there. I can't seem to find the cause. I have marked a few on the high side with a marker and tweaked them more or less straight. I'm wondering though if my new Lee die could be off center, and how I could rule the die out as the problem?

Dutch

"The future ain't what it used to be".
-Yogi Berra.

Hornady dies have a floating sleeve to keep the boolit straight as it is
seated. Redding and Forster make very expensive 'benchrest' seaters that
also have the floating sleeve. I ONLY buy Hornady rifle dies anymore.

Bill

If it was easy, anybody could do it.

Are you using a TURRET press? I've seen the turrets pop up a little from wear.

Sounds like the seating stem is not fitting the boolit olgive. You said it is a Lee die. In a Lee seater die the seating stem can be inverted and they will sometimes come from the factory that way. One end is recessed to fit the boolit/bullet and the other end is flat. First check to see if the seating stem has been inverted and has the flat end down.
If that is not the problem check the recessed end for fit to your boolit. There could be a burr causing the boolit to tip while being seated or the recessed cut is a poor fit to your boolit olgive or something else with the seating stem like the recess being bored off center.
One other mistake people make is in locking down the die in the press before alignment has been made. Let the die float until the press ram pushes it into alignment then lock it down.

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Abbreviations used in Reloading
Pointed Soft Point "Core Lokt"

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