Hi Nick,
Thanks for your input and i appreciate you sending me a U3 for me to evaluate myself, hopefully i will receive it in time to use it at Westfield on Sunday. I will of course do my own testing of this choke in due course but the tighter the choke the more subtle the differences in my experience and to be honest if i do decide to switch to them i would be using U2 and U1 the most. As you haven't got either of these to test i am interested to hear other peoples experiences of these chokes as the claims of the manufacturer are quite profound! Please do note that i have stipulated that i wish to hear from people who have personal experience of these chokes only. I also shoot a bit of skeet as well as sporting hence my interest in the more open chokes as well.