This used to be more of a prpblem some years ago. At least one manufacturer (and yours were evidently made by them) used to ream the body of their dies, then ream the neck afterward. Thus they could make .25-06, .270, .30-06, .338-06, .35 Whelen dies cheaper. Same deal with .243 on up on the .308 case, and .264 Win./7mm Rem. Mag, etc.

I had some of those dies, including some real cull .358 Winchesters and "custom" .338-06 dies. But apparently nobody does that anymore, or if they do they do it right. I have been testing full-length sizing dies by running a fired case into them without the expander-ball assembly for many years now, and since around 1990 haven't found any that result in more than .001" runout with a sized case.

But it's something to watch out for when buying used dies.

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