Ladle hot jelly into hot jars, leaving ¼ headspace. Wipe rim and center lid on jar. Screw band on until fingertip-tight. Place jar in boiling water canner. Repeat until all jars are filled.
Process jars for 10 minutes, adjusting for altitude. Turn off heat; remove lid and let jars stand 5 minutes. Remove jars and cool. Check seal after 24 hours. Lid should not flex up and down when center is pressed.
Notes: When cutting or seeding hot peppers, wear rubber gloves to prevent hands from being burned.