Originally Posted by KeithW
Then as the official body there's no reason why UKAHFT shouldn't require affiliated clubs to complete an annual membership return as part of their affiliation.
Sorry but you are trying to give reasons why we should find that information not the other way round.
I'm not sure that knowing the numbers/demographics of a club is going to drive membership, affiliation or competition but it is down to the individual clubs to run their clubs as they see fit & UKAHFT aren't going to start demanding figures from any club whether they are affiliated or not, plus getting averages & estimates of numbers is pretty pointless.
Figures for competitive shooting are readily available on the internet for a lot of clubs but it would be an enormous task to collate them & would probably be well below the actual number of participants, you could always ask the clubs yourself if you want figures.