I like Herrett's, especially their Jordan Trooper model. Last spring I got a set for my 1958 Colt DS (hard chromed and tuned — I've posted about it before.)
I also have a set of Persinger ivories and a Tyler-T for it, which is more attractive, perhaps, to look at, and better for concealment. But, I gotta say, with my large hands the Herrett's do provide a better grip:
These are my third set. I also have them on my 640-1 and my Colt Three Fifty-Seven:

I also have a set of Persinger ivories and a Tyler-T for it, which is more attractive, perhaps, to look at, and better for concealment. But, I gotta say, with my large hands the Herrett's do provide a better grip:


These are my third set. I also have them on my 640-1 and my Colt Three Fifty-Seven:
