Wash the beans and put them in a large saucepan. Add cold water to a level 2 to 3 inches above the beans and soak them 12 to 18 hours, then drain and discard the water.
To quick soak instead, cover the beans with water, bring them to a boil, boil 1 minute, then take the pot off the heat and let them stand 1 hour before draining.
Combine the drained beans with 5 1/2 cups fresh water and 2 tsp of the salt. Bring to a boil, reduce the heat, and simmer 30 minutes. Drain again and discard that water.
Prepare the pressure canner, 9 pint jars, lids and bands. Put the trivet in, add 2 to 3 inches of water following your manufacturer's directions, and bring the canner to a gentle simmer with the jars warming inside it.
Brown the ground beef in a large pan, then add the onions and peppers. Drain off the fat.
Add the remaining 3 tsp salt, the black pepper, the chili powder, the tomatoes, and the drained beans. Simmer 5 minutes. The mixture will look thin, which is correct. Do not thicken it.
Divide the solids evenly among all 9 hot jars with a slotted spoon, then ladle the liquid over them, leaving 1 inch headspace. Top up with boiling water if you run short of liquid.
Release trapped air bubbles, then check the headspace again and adjust to a full 1 inch.
Wipe the rims and threads clean, set the lids on, and apply the bands fingertip tight.
Load the jars into the pressure canner, fasten the lid, and vent a steady stream of steam for 10 minutes before adding the weight or closing the petcock.
Process pints for 75 minutes at 10 pounds pressure in a weighted gauge canner or 11 pounds in a dial gauge canner, adjusting for altitude (see notes).
Turn off the heat and let the canner depressurize on its own, then wait 5 minutes before removing the lid, opening it away from your face.
Leave the jars in the canner another 10 minutes, then remove them to a towel lined counter and let them cool undisturbed for 12 hours.
Check the seals, remove the rings, label the jars, and store them in a cool, dark place.