Posted: 31/08/2015 at 11:38
Interesting, as the one part of the plant/fruit there is no pectin is the stone. Perhaps you are thinking of pips as in Seville oranges. Or perhaps your informant was just plain wrong!
One tip for sloes, bullaces or damsons in spirits is to put them in the freezer for a day or two then the skins split naturally when they thaw out and you don't have to prick the fruit.