A little advise.. use American Pioneer Powder 3f when you shoot the revolver. The clean up is a lot easier, the accuracy is fine, and lots of powder. I shoot the 1858 Remington New Army in .44 caliber. I load 30 grains of APP 3f, then a bore button, then a .451 ball, and finally I grease the cylinders.
That is a 2" plank that I was shooting through. I was impressed that the revolver was able to blow through that so easy. All the shooting was done free hand at 25 yards. Since you have a 1851 revolver without the top strap, I am not sure of the max powder load it might take. I suggest that you check the manual real close.
These are a lot of fun, and with the APP powder clean up was a snap... I will never shoot anything but APP in that revolver anymore.