I only use XP2, and before that XP1, with Leicas and have never had a grain problem at up to 20"x16". I used to process in Ilford XP2 chemicals but since they have finished I use Photocolor II with no problems.(posted 8740 days ago)Has anyone had a grain problem with XP2? Many of our club members now use XP2 and no one has ever complained about grain.