Sorry Sack, but the Pietta grip outline is dang near exact to a Colt (most SAA grips aren't perfect on any pair of guns..) Here is a pix of a GW2 wearing a set of Colt factory eagle grips. Required almost no fitting...
curley
Well, you can put gen 3 grips on them and there is some room to work with. And at that, it might be a fairly easy job. I’m speaking to maybe a different level of detail, good, bad, or indifferent.
Consistently, on the Pietta if you want to drill the alignment pin in the same spot as the SAA, you’d drill through the main spring screw.
Consistently, the Colt has more forward ‘toe’ or 'hook' on the TG / BS corner.
Consistently, on the Pietta the backstrap to rear frame edge angle exceeds 90 degrees just a bit. Which is weird, but the way all Pietta’s backstraps are rendered, and very related to the ‘sail’ some of them show. But that combination of less toe and more backstrap angle means that yes, the Colt profile is maintained, but the assembly is jutting off at an odd, un Colt like angle.
Not a big deal usually, because as I say, the guns have generally the correct appearance.