I have a Uberti replica of the Colt SAA with interchangeable cylinders in 44 Mag & .44-40. It is no problem to either load >44 spl shells n the mag cylinder or load them mag brass down to 44 spl levels. This allows me to load about any level of .44 ammo I might desire. When I acquired it a co-worker had a 2nd generation original Colt SAA, I believe was in .45 Colt. This Uberti was as smooth & seemed of equal quality with the @nd generation Colt. No doubt a pre WWII 1st generation Colt would be better, but this Uberti stacked o extremely well against the 2nd generation Colt.