375 H&H by Holland & Holland Aperture sight windage adjustment
I have a 375 H&H by Holland & Holland that is fitted with a cocking piece mounted aperture sight. The problem is the rifle shoots a foot to the left at 100m. I tried to figure out how to adjust the windage on this aperture sight so it might work , but unfortunately has had no luck so far. The front sight is captive - it slides into position without any possibility for sideways movement. Any assistance would be appreciated.