Prepare a pressure canner according to manufacturer's directions.
In a large skillet, brown the ground beef in a small amount of oil or beef fat. Season with salt and pepper and/or seasoning as the beef cooks.*
Pack ground beef into jars and cover with boiling liquid of your choice, leaving 1-inch headspace.
Wipe down jars with a clean dish cloth and apply 2-piece canning lids until fingertip tight.
Load in jars into prepared pressure canner.
Allow the canner to reach the correct pressure (see notes below) and process pint jars for 75 minutes or quart jars for 90 minutes.
When the timer goes off, remove the pressure canner from heat and let the pressure naturally release until it reaches 0 PSI.
Transfer the still-hot jars to a clean surface using a jar lifter, leaving an inch of space between each jar, and let cool to room temperature (12 to 24 hours).
Check the seal for each jar, remove the rings, and wipe down the outside of each jar with a clean cloth. Unsealed jars should be stored in the refrigerator and used immediately.
Store sealed jars in a cool, dry place away from direct light for 12 to 18 months.