I ran across a copy of the Army's manual of Cavalry Tactics from 1860 a while back. There's an appendix that contains "A Manual for Colt's Revolver".
The trooper being mounted, holding the reins as presecribed in Cavalry Tactics, the pistol either in the holster or pistol-case, the instructor will command:
Draw-Pistol
2 times.
1. At the first command, unbuckle the holster or pistol-case, seize the pistol by the handle with the right hand, holding it between the palm of the hand and the three last fingers, the forefinger resting on the guard, the thumb on the handle.
2. At the second command, draw out the pistol and elevate it, the guard to the front, the wrist at the height of, and 6 inches from the right shoulder.
Six times
1. Load.
1 time and 1 motion.
1. Place the pistol in the bridle-hand, holding it by the handle in front of the body, the hammer between the thumb and fore-finger, and turned to the left, the muzzle pointing upwards. Carry the right hand to the cartridge-box and open it.
2. Handle-Cartridge.
1 time, 1 motion.
Seize the cartridge with the thumb and the first two fingers, and carry it to the mouth.
3. Tear-Cartridge.
Bite off the end and carry the cartridge opposite the chamber nearest the lever.
4. Charge-Cartridge.
1 time and 2 motions.
1. Empty the powder into the chamber, and insert the ball, pressing it down as far as possible with the thumb and fore-finger.
2. Turn the pistol with the left hand, bringing the hammer towards the body, and cock it with the thumb of the right hand.
5. Ram-Cartridge.
1 time, 2 motions.
1. Seize the lever at the catch wit hthe thumb and fore-finger of the right hand, ram down the ball, and replace the lever.
2. Let down the hammer with the right hand, and carry the hand to the cartridge-box.
Repeat as above until all the chambers are loaded.
6. Prime.
1 time, 2 motions.
1. Lower the muzzle towards the right side by turning the wrist of the bridle-hand, the muzzle pointing downwards, the hammer to the front, the left wrist resting against the stomach; half-cock the pistol with the left thumb, turn the cylinder with the thumb and forefinger of the right hand until it clicks. Take a cap and press it on the exposed cone. Turn again the cylinder until it clicks, and so on until all the cones are capped, the hammer resting on the safety notch.
2. Seize the pistol at the handle with the right hand, and bring it to the position of draw pistol.
The instructor wishing to fire, will command:
Ready.
1 time, 2 motions.
1. Place the pistol in the left hand, the little finger touching the key, the barrel nearly vertical, the muzzle a little inclined to the left and front, the guard to the front, the thumb on the head of the hammer, the fore-finger along the guard.
2. Cock the pistol, and bring it to the position of draw pistol.
Aim.
1 time.
Lower the pistol, the arm half extended, and place the fore-finger lightly on the trigger, the muzzle directed to the height of the man's waist.
Fire.
1 time.
Press the fore-finger steadily on the trigger, fire and retake the position of draw pistol.
The men being at a ready, and the instructor wishing to fire all the barrels in quick succession, will give an intimation to that effect, and then command:
1. Aim-2. Fire.
The men will fire, then take the first position of ready, cock, aim, and fire again, and so continue until the pistol is discharged; then take the position of draw pistol.
The instructor wishing to reload, will command:
Load at will.
Load.
1 time.
Load the six chambers as heretofore prescribed, and take the position of draw pistol.
Return Pistol.
1 time.
Lower the muzzle of the pistol, and return it to the holster or pistol-case.
When the troopers become well instructed in the use of the pistol, the following mode of coming to a ready will be substituted for the above.
Ready.
Incline the muzzle of the pistol to the front, the wrist remaining six inches from the shoulder; place the first joint of the thumb on the head of the hammer, and cock it by an extension of the thumb, and resume the position of draw pistol.