Yes I frequently shoot my English guns here at sporting. I recently shot my Lang 1897 hammer pigeon gun and was crushing 50 yard targets with it. Last weekend I shot my Dickson RA and had my moments to say the least.
Problem here in the U.S. is finding shells that will be ok to use. My pigeon guns can take whatever I want to feed them but my 6lb Dickson needs something less on the punchy side.
I had some leftover Caledonian 3/4 oz loads and I shot some B&P Comp1 7/8 loads at 1160 FPS.

Mike Proctor