currant jelly

I planted a red currant bush at my parents' house when I was a kid. Naturally, its most fruitful time has been since I've no longer been there. My parents dropped off about two pounds, so I made jelly (referring to Jane Grigson's Fruit Book as well as the preserving manual Putting Food By) :

Ingredients: just equal parts (weight) currants and sugar.

Grigson says to boil hard, then boil for 8 minutes. Sounds vague. I do like that she leaves the fruit whole (even suggests not taking out stalks) and then straining it. Putting Food By suggests making currants juice, then making jelly. That seemed to troublesome. But they direct one to boil until 8ºF above boiling.

I boiled the currants and sugar until they were at 220ºF, whisking at one point to make sure that the fruit was all broken. I strained it through a sieve and got 5 ½ pint jars. [n.b.: hot water bath for 6 mins.] It's tart and deep, deep red.