James,
Pyrodex Select is Hodgdon Powder's premium Pyrodex grade for consistency,& marked "RS"(Rifle/Shotgun), equivalent to FFG. Of course, you can shoot FFG grade, Pyrodex or black powder safely in any black powder revolver. Pyrodex "P" (Pistol) grade would be better for revolver shooting, but 19 lbs, Hey!
Sounds like you're set for life for revolver shootin'.
Using a 20 grain load, you'll get about 350 rounds (more with Pyrodex) to a pound of powder; multiplied by 19 lbs (350 X 19= 6, 650 shots) Might want to see if you can sell off some of your"hooch" and invest in the real black powder.
The two remaining Italian manufacturers of reproduction cap & ball revolvers are Uberti & Pietta.
Importers of these two manufacturers include Taylor's & Co, Inc, Cimarron F.A., Navy Arms Co., Dixie Gun Works, Beretta USA, EMF, Traditions, Euroarms, and others. I highly recommend Taylor's & Co. out of Winchester, VA.
The Colt replicas include the Walker, the three Dragoon models, the Patterson, the '49 Pocket Model, the '51 Navy, the 1860 Army, '61 Navy, '62 Police, and the '62 Pocket Navy. Regrets if I missed any model.
Of these, the favorites are the .44 caliber, 1860 Army & the .36 caliber, 1851 Navy. In an effort to capitalize on sales, manufacturers/importers went beyond "Authentic Reproduction", and produced a number of .36 caliber models in .44 caliber. So, now you can purchase the 1851 Navy in either .36 or .44 caliber.
Those to avoid: any Italian or Spanish revolver that doesn't have the "A. Uberti" or "Filla. Pietta" mark somewhere on the barrel. Parts availability is the primary reason.
The only drawbacks to the Colt (Any model) is the open top frame, and the wedge securing the barrel to the frame. The Colt design is more suspect to cap fragments jamming the action, and sometimes, this requires separating the gun frame from the cylinder and barrel, and trying to dislodge the fragments.
Now, if you want to change your outlook and buy a traditional revolver design that jams less and is very, very accurate at 25 and 50 yards,
consider the "1858 New Model Remington Army" .44 caliber by both Uberti & Pietta.
All depends on what is most important to you.
Hope this helps,