Federal primer cups are tender. I don't know if it helps make any difference in handguns, but they aren't recommended for use within a Garand. CCI 250 – While not promoted as Component of CCI’s “benchrest” series, quite a few say these primers develop good consistency for a magnum rifle. https://federal-match-ar-primers57890.rimmablog.com/31217933/top-guidelines-of-federal-primers-small-pistol