A new outdoor competition format was run at a club nine miles west of Worcester this year, not too far from you. The top score over the three shoots was by a very competent shot using an HW77, and the joint third highest score was also from a very competent shot using an HW77. There were a lot of PCPs competing, so I think the format could be described as equalising.
The dates for 2013 shoots are being finalised now. Details can be found
here.
There's no reason why a well set up HW77 with a 4x40mm couldn't win.