Hey Guzzijohn,
I realize that I'm months late to the party....but here goes:
Recently, I bought a brand new, old stock, Colt New Frontier (circa 1981) in the box, complete with all papers, tag etc, from a 50 year Colt Dealer, whom I've personally known for close to 40 of those years. Caliber is 44-40, barrel length is 4-3/4", and not even a turn line on the cylinder.
Nice looking gun.......fit & finish were of top quality, but the action?
Gritty as gritty can be, heavy as heavy could be.
Since I had a collection of ceramic stones, files, and other implements of drudgery, I decided to disassemble the revolver.
First, a call to Wolff springs was in order, and with those arrived, I proceeded with My mission: a Colt which felt like a Colt, rather than a toy store cap gun.
The tunnel where the hand is housed is the real kulprit here.
Colt Mfg contracts with a vendor company, who uses EDM machining to cut that tunnel through the frame, which leaves the surface resembling a "rough cast" type surface.
The frames are hardened, after all machining has been performed, followed by assembly of the revolver.
That rough tunnel coupled with an un-smoothed, or un-polished hand and other rather rough parts, does not do the revolver any justice.
Anyhoo, to make a short story long, smoothing the internals of a Colt New Frontier SAA, then adding the Wolff spring kit, as well as a dab of Gunslick grease here and there, netted a super smooth action, with a 2-1/4 pound trigger weight of pull.
Hope this helps to answer Your question.
See the attached images:




