If you use a filler to hammer against you can do an even job but it will mark up when you displace metal. Not exactly what I'd want on a 120 year old antique. Center punvhing the dovetail flat to raise divots sorta works if not too loose but not exactly the way I'd treat an antique! What The Kid said at the top, build up the sight. Not having TIG I've used Brownells low temp silver solder.
