HW97, sitting, 55yds... aimpoint underneath key tip... Key measures 8mm, so vertical spread was 10mm CTC or if you are Conor, 14.5mm. Wasn't worried about the windage spread as I just was using a consistent aimpoint and didn't move for wind.
Mozzies, straight from tin. 10 shots.
BFTA/NSRA County Coach
CSFTA Chairman/BFTA Rep