Blackberry Jelly Like Grandma Made - cooking recipe

Ingredients

16 cups blackberry juice
12 -16 cups sugar
3 cups water, to boil with berries

Preparation

Rinse berries and place in large kettle with water.
Bring to a boil and simmer for 5 minutes.
Drain berries and put threw cheesecloth to remove all seeds.
Add back to kettle with sugar.
Boil to 220 degrees (-2 degrees for each 1000 feet above sea level)- I just used 220 in Ohio.?.
I have noticed I need to boil at the 220 mark for awhile for a nice gel, so make sure you not only hit the 220 mark but go for 221, to be on the safe side.
Put in sterilized jars.