An excerpt from my Feb. 11, 2003 post:
The February 1975 issue of the American Rifleman has an interesting article on what loads were used in Civil War .36 and .44-caliber paper cartridges for Colt revolvers.
No mention is made of Remington or other cap and ball revolver charges but they were likely identical or nearly so.
No granulation (FFG or FFFG) is noted in the article. Round balls were generally not used in paper cartridges, but were loaded with loose powder.
There was a surprising disparity in bullet weights and powder charges in paper combustible cartridges for the Colts, according to the article.
Conical bullets for the Colt M1860 Army .44-caliber revolver ranged from 207 grs. to 260 grs. Powder charges ranged from 17 to 36 grains of black powder.
Conical bullets for the Colt .36 Navy ranged from 139 to 155 grs. Charges ranged from 12 to 21 grains.
Nearly all of these variations are found in prepared, paper cartridges manufactured by private contractors. It appears that U.S. government arsenals made few paper revolver cartridges, preferring to contract this task.
Union Army ordnance manuals of 1861 specify a load of 30 grs of powder with a .46-caliber, 216 gr. conical ball in Colt M1860 revolvers.
The same manual specifies a .39-caliber conical bullet of 145 grs., over 17 grs. of powder.
An official Confederate States publication specifies a 250 gr. conical bullet over 30 grs. of powder for the Colt M1860 revolver.
The Confederate specification for the Colt Navy is the same as the Union (.39 caliber conical of 145 grs. over 17 grs. powder).
This article makes no mention of multiple ball loads in the old cap and ball sixguns. It's an interesting question. I may have to try it someday, over the chronograph.
My .36 Remington surely has chambers long enough to accommodate two balls and perhaps 15 to 20 grains of FFFG black powder. Ditto with my Remington .44 Army.
My Colt 1851 Navy may be a bit dicey; whether you could ram two balls down its chamber and still have room for any appreciable amount of powder remains to be seen --- but I doubt it.
I'd rather risk my el-cheapo Remington .36 (made by Pietta) than my 1851 Navy (Colt 2nd generation).
I was unaware that the murderous scoundrel Porter Rockwell used double-ball loads in his belly gun. I seem to recall seeing a photo of a Colt 1860 Army with the barrel cut just forward of the wedge slot, attributed to him. Or am I thinking of some other nefarious gunman? Such shortened Colts were not entirely unknown on the frontier.
But I don't recall hearing about double-ball loads in cap and ball sixguns. Doesn't mean it wasn't done, though.
There was lots of tinkering, gun and otherwise, in the Old West. Witness the wagons with sails for wind power across the prairies and Great Salt Desert (not a success) and other hare-brained ideas.
Hmmmm .. have to try that double-ball load just for fun.
On a related note, yes, the Army tinekred around with three-ball loads in the .45-70 case. I believe these loads were intended for guards and sentries, not for combat use in the field.
Some years back I assembled a few such loads for my Marlin .45-70 lever-action. It was three balls over Unique powder, with each ball separated by a Wonder Wad.
I made them as a prank on a friend, who had no shooting experience. I showed him the brigger, safety half-cock, how it was loaded and so on. When he wasn't looking, I slipped in a three-ball load.
He eased down on a big paper target 25 yards away and touched it off.
Bang! Three holes appeared!
He appeared puzzled, but said nothing.
Then I reloaded it with another three-ball cartridge.
Bang! Now there's 6 holes!
Continued puzzlement but no comment.
Bang! Nine holes!
"What the hell is going on?" he said to me.
I burst out laughing and let him in on the prank. He thought it was a pretty neat load. I still do too.
For a while, I had four such loads in my Marlin 1895 rifle as a house gun when I lived in apartment complex in Idaho. I figured three .457 inch balls at low speed would ruin any intruder's day but not overpenetrate and harm a neighbor.
Later, I started loading a 20 gauge shotgun with No. 6 loads as my house gun.
Multiple ball loads can be fun for tinkering. The biggest bugaboo is that most lead balls are made of very soft lead, and they'll lead a bore in short order. The Wonder Wads in my .45-70 load seemed to help discourage leading.