Unfortunately, with the barrel in .45, there isn't a lot of metal there for a dovetail. Very easy to wind up with a hole thru to the bore. Not recommended.
Also, often the barrel band is slightly oversize for the OD of the barrel and even with the screw tight, the band won't grip. If it's a Uberti, normally, the screw is not only tight, it is also seized and an absolute PITA to get out. Usually drilling and needing a new barrel band. I can recommend the barrel band from Pioneer. Usually snugs down just fine, although you may need to twist it back into alignment on occasion. I would also recommend reference marks for returning the sight to "zero" when needed.
Play Safe Out There