I have never been to AC Sporting Targets but assume it is part of the West London Shooting School by the Polish War Memorial on the A40? I assume it is not just airgun dedicated.
Why not join a airgun dedicated club like the West London Rangers which is down the road?
I hope that they are still there, I was a member about 10years ago and there were loads of people to talk to about FT and HFT and learn from...
Have a look here: