To Bob and Paul,thank you for the information and links,i will print some of this off and see if i can do something in the autumn.
Its certainly something different!not heard of this before.
Have to look and see what guns will be usable,i have a Terrus,scoped only,a Gamo 440 in 5.5!but has opens!and my only pistol at the moment is 6mm air soft!
Thanks again.
Don.