King Medallion,

Here is a link to a 2016 posting that a lot of people added their knowledge to about the USAF and earlier revolvers.  Two of them are the people that have already posted to you.

https://www.cascity.com/forumhall/index.php?topic=57348.0

I think it will answer your SN# question but not your pricing question.

Shortly after this 2016 timeframe. there was a local shop that had a 'special order' USAF polished steel finished 38/40 'China Camp' at a price of $1400.  I believe China Camp revolver were all USA made.  I was watching for several weeks but it sold before I could gather and justify the monies.  This is the only price reference point, I can offer to you.

I, unfortunately, was never able to put my hands on a Rodeo or any affordable USAF - USA revolver.

Good luck if you do get this one.

I will tell you this though, I get more residue back in the action from racking the action as fast as I can shoot than I ever do on the range taking my time between shots.  There are speckles all over my '66s from black powder still smoking as I eject shells during a match.  I get as little as I do with my original Win 73 in .44 WCF when I am taking my time between shots (no hot unburned  powder flying...)

~Mako

My 1860 Henry and 66 both wear that patina on the receiver.

Here is a picture of still burning powder coming out of my shot shells as they are ejected from my 1887

First question, is it 2F or 3F?

3F is for modern muzzle loaders only.
2F can be used in cartridges, shot shells and modern muzzle loaders.
Hodgdon does not recommend that any grade of 777 be used in antique firearms.

Load it to just shy of the base of the bullet. Hodgdon does not recommend compressing 777.

Link to Hodgdon's loading data for 777

https://hodgdonpowderco.com/wp-content/uploads/2023/04/cowboy-action1-1.pdf

Found a pound of 777 and would like to use it in .38 Special with 124 grain bullets.
It is a bit hotter than Pyrodex or APP I am told.
My question is do you load like black powder to bullet base or like smokessomewhatless (ug) powder leaving some space in the case or some 777 and filler to base?.
Non snarky responses please I am a Gunpowder guy but you can't beat free.
Holding center
hitting occasionally
Bunk

My 92 is not as fussy on 38 Special cases as a previous one, so using a 158 grain bullet feeds well. I have never shot bunnyphart loads, so I would use a proper load. Considering trying the 38s as my BP set up as I just got a stainless Vaquero and have a pair of Conversions to handle the BP stuff.