Ditch the Lee FCD!
You’re amplifying the differences between makes/lot#s of brass by reducing the size (diameter) of the bullets by squeezing them through the FCD. (Case wall thickness).
I use Lee dies and have burned many pounds of Unique. I use mostly the 200gr SWC and get splendid accuracy from the .45’s.
I use a Lee “RIFLE” FCD, on .30/30, .35Rem, .308MarlinExp, and .338MarlinExp. And .45/70 to prevent bullets from collapsing in a tubular magazine.
But NEVER with a straight wall case pistol cartridge.
It's an entirely different design…
The carbide sizer ring in the PISTOL FCD sizes the OUTSIDE of the loaded cartridge which includes the lead bullet inside the case.
I’ve seen hollow base wadcutters that in mixed brass will shoot 1.5” groups at 50yds, But run them through a .38spl FCD and you get 1.5 foot groups with key-holes…
You can however punch out the Carbide sizer and still use the crimp, but that defeats the purpose of the FCD die which is to assure the ammo “plunks”.
Ok for run-n-gun blasting, but not for PPC or Bullseye type shooting where accuracy is paramount.