That's good info. The clay ground I go to is fibre only so I'll be needing Eley or Lyalvale for that. I want to be able to practice with a cartridge as close to my current preferred game cartridge as possible. So an 18 gram Eley 7 could work! The Lyalvale 3' is only 16 gram and not available in anything but 5,6!
Currently use the Fiocchi 19g 6 for game and experience good results on driven birds. They also make it with 7.5 - moving to the smaller shot size will help the pattern? Could I not just tighten up the chokes with the 6 shot and get similar results? Just don't think I'd like to be using 7.5 come January!
Thanks everyone for comments so far - Fiocchi really pulling ahead for Italian game cartridges!