Never needed a U-Die for any 45 loads.
The 45 barrels I encountered (1911/2011 manufacturers + KKM, Nowlin, Kart, Brown, etc.) have been more consistent in chamber and bore sizing than say 9mm.
I've only used U-Dies for jacketed bullets in 9mm and 40, not coated which are slightly oversize.
Really no issues with the FCD dies except for rare oddball 9mm barrel that required quite oversized lubed lead/coated bullets to be accurate.
Just check your bullet with the FCD before you go all full production mode.