Erik is quite right. Win 209s fall out of a Cheddite or Fiocchi hull on occasions and the Fiocci or Cheddite 209's I had to buy to reload Cheddite and Fiocchi will, in my experience, enlarge the primer holes in an AA hull so one is stuck with using Fiocchi primers in this situation. I just put the calipers on some of my Cheddite 209 primers. they are averaging .243 in diameter whereas a sampling of WW 209 primers average .241.
Quod erat demonstrandum, as the beak at my school in Limeyland would say, in 1950 or so. So there, as we might say today.
Mike
