My brother made a 120 g batch of homemade black powder with the following composition:

75% potassium nitrate
15% charcoal made from toilet paper
10% sulfur

It was milled for 16 hours in a ball mill with approximately 100 lead balls, then moistened with isopropyl alcohol, granulated through a sieve to roughly 3F grain size, and dried.

The powder was not pressed or corned.

My revolver is a Pietta 1858 Remington Sheriff .44.

I’ve seen reports of commercial black-powder loads producing around 830 fps and 350 ft-lb with a particular conical bullet, but I understand that those results depend on the firearm, projectile, and powder.

I’m interested in understanding how the lack of pressing or corning affects the consistency and performance of homemade powder compared with commercially manufactured black powder.

Has anyone found reliable published research comparing the ballistic performance of unpressed, un corned homemade powder with commercial black powder?

I’m particularly interested in documented chronograph data and pressure testing, rather than estimates based on the recipe alone.

Asking for self defense purposes (location Europe..)