I shoot in the Midlands and there is a good league going in and around Hinckley. The format in our club is 6 shots, with a bell being 5, so maximum of 30.
There are a couple of people who can get 29/30 quite regularly but they are very good shots and have been doing it for a long time. Most people using SSP's or recoiless springers will see 4 or 5 bells as a good score. This is a high percentage of bells, but then the challenge changes and you have the higher pressure shots of trying to get all 6 bells.

If you are doing it more for fun than competition (like me) then use any gun you want and challenge yourself. My scores with the guns I use would be something like:

Diana 75 = 28 or 29 on a good day
Diana 66 = 27 or 28
Anschutz 335 (probably similar to the HW30....) = 26
BSA Cadet Major = 25
BSA light pattern = 24 or 25

I find the main differences leading to higher scores are the stock fit, and the trigger pull. The recoil doesn't bother me much