About 755 fps, more than enough for this type of weapon at 15 yards...27gr of powder for a 400+ grain bullet? What velocity does such a small charge generate?
I would just make paper cartridges with .648 balls and a 30gr charge of 3f or 2f.
what was the original historic powder charge for the cartridges these pistols used?
Original (year 1800/1801): .63" round lead bullet (weight: 378 grains), cartridge powder (charge: 116 grains including 15 grains for priming).
I use a small priming flask to primeNow that's a light load! After priming the pan you're looking at 20-25 grains of powder under an unpatched 400gr ball that's .04" under bore size. My guess would be a muzzle velocity of 250-300fps. On the bright side you could hang a blanket behind your target to catch and reuse your balls.
@Erwan There is a video of a 1777 pistol (same barrel length and caliber) using 60gr cartridges and the shooter has no problem with powder failing to burn. An 8 inch 69 caliber barrel is going to have a lot more room to burn powder than for example a 8" 50 caliber barrel.
I use a small priming flask to prime
The service charge for a .54 Aston sea service pistol is about 35 grains of "fine pistol" powder, obviously the ball here is bigger but there's not much barrel to burn up something like a 70 grain powder charge , you'll just be blurping out a bunch of unburned powder
Everyone gets Magnum-itis but the intent was to smack the enemy with a huge lead ball at pretty much bayonet charge distance, not make the pistol into a hand musket
Here's a target I shot at maybe 2 yards away with one round from a Walker, with a 55gr charge. Those specks that look like birdshot are totally unburned powder grains blowing into the target. And a lot of them. At a certain point, with blackpowder pistols , you just reach the point where you're trading portability for power. There's nothing you can do to make powder burn faster in a pistol length barrel.
There is a massive difference in powder burning capacity between a 44 caliber barrel and a 69 caliber barrel (I attempted to do the math, but I'm too dumb). The mass of the ball is also significantly different, around 150gr for the 44 caliber ball and 400gr for the 69 caliber ball.
The original "116 grain" thing is in no way similar to how powder is measured today ..these were historically loaded with a paper cartridge with approximately a .65 ball and 30-40gr of Fine powder
I'm looking forward to the results@Stantheman86 I will be trying your cartridge load of 30gr as well as 60gr and maybe 100gr. I'm dubious of what 20gr of powder will do for an unpatched 400gr round ball, but I lose nothing by trying it and I own a very nice chronograph to examine the results. Exploring historic cartridges is just as interesting as the guns!
@Stantheman86 I will be trying your cartridge load of 30gr as well as 60gr and maybe 100gr. I'm dubious of what 20gr of powder will do for an unpatched 400gr round ball, but I lose nothing by trying it and I own a very nice chronograph to examine the results. Exploring historic cartridges is just as interesting as the guns!
Here is a French M1822 .69 Service Pistol, converted to percussion. It has a ramrod with a powder measure in the tip. It would look to me to hold no more than 30 some odd grains. This is an original pistol and they had these ramrods to make loading without cartridges possible.
Ok so that makes it clear as mudHello,
It is a model 1822-T/Tbis of caliber 17.6mm (T) and 17.7mm (Tbis).
Derived from the pistol model 1822, the model 1822T incorporates in its composition a major technological advance for the time, the setting of fire by capsule also called the setting of fire with percussion. This transformation takes place in the middle of the 19th century and radically modifies the silhouette of the handguns used then. The modified weapon does not change the name, one is satisfied to affix a T following the model, which gives in the present case pistol model 1822T for transformed.
This weapon used the same cartridge as the 1822-T-Tbis rifle.
The rifle cartridge had to be "bled" (which was forbidden on the other regulation weapons) and the surplus of powder for the gun was poured in the cup of the loading rod: the cup does not contain the load of the gun but the surplus of the rifle cartridge so that the load is adapted to the gun.
So the amount of powder equivalent to the cup was removed from the rifle cartridge.
The initial velocity was ~180 m/s or about 590 fps.
- Charge of 46.30 grains (1822-T).
- Charge of 31.00 grains (1822-Tbis).
Caliber:
17.6 mm (mle 1822T) 17.7 mm (mle 1822T bis)
Ammunition:
Spherical lead bullet of 17 mm (mle 1842) then of 16,7 mm (mle 1848), encartouchée powder (charge: 46.3 grains) for the 1822T.
Oblong lead bullet of 17 mm (mle 1857) then of 17,2 mm (mle 1863), cartridge powder (charge : 31 grains) for the 1822T bis.
We don't always know American weapons well BUT we know OURweapons well enough....
Pistol An IX :
Caliber: 17,1 mm
Ammunition: round lead bullet of 15,98 mm (weight: 24,50 g), encartouchée powder (load: 116 including 15 grains for the initiation)...
View attachment 199336
I don't know, basically the OP can just pick whatever charge makes his twigs and berries warm and fuzzy and go shoot his Italian- French repro flintlock. 69 because no answer is gonna satisfy that guy anyway until he comes back with chrono data from his 70gr load proving it's the best plus YouTube guy says 60 so history goes out the window because people want "ego loads"
Good please ignore me, it filters out more of the noise in here@Stantheman86 It's a shame you're such a child that you need to insult people rather than converse as an adult. I have been civil and respectful despite a differing of opinion, thus doing nothing deserving of insult. You will now be put on "ignore" because I am far too old to be dealing with other people's children.
@Erwan Thank you for the very interesting information. I have never heard of that method for downloading a cartridge before.
I am not a target shooter and do not care for the "most accurate load". What I find most enjoyable is to shoot guns with their historic loads in order to experience what the original shooters experienced. An example: as a recent project I remanufactured some 6.5x52 cartridges dated "Nov 1940" to experience cupronickel jacketed bullets over cordite charges in an original excellent condition rifle.
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