Thanks to you both for your input short sight base yes your right never thought of that i have a hw77 rear sight if i went the metal breach way but not sure if that would be any good forward of the breach mmmm thinking
Hw30 had seen 1 in skeggy gunshop very small like a kids gun do they fit adults im 6 foot though being a HW will have good barrel & trigger 2 most important things for me will call into shop have a look woman in there knows lots about bell target and shoots in a lot.