I'm using Dillon .223 dies on my Dillon 550. I'm setting the resizing die to have a .223 case fit properly in a Wilson case length headspace gauge. But after seating and crimping a bullet, the now-loaded case then sets a smidge too deep in the case gauge. This only occurs, however, when I'm using PSD brass and 69 grn SMKs. It does not occur with LC brass and 55 grn Hornadys, for example, or with other calibers. I can't figure out why this occurs. Of course, the easy solution would be to back out the resizing die so the final product will headspace perfectly, but that's a band aid on the real problem. Any thoughts?