Jaegermeister,
What's stupid about a 300 yard sight? Sure, most would prefer to use a scope at that range, but your question implies that a target can't be hit it that range using iron sights. I beg to differ.

TT, It's tough to tell with out looking at the rifle obviously, but in my limited experience with Brit magazine rifles I can tell you that just becasue something looks a little "off" doesn't mean it's aftermarket. The UK produces the prettiest shotguns on the planet, but they seem to have focused a lot less on asthetics with some of their bolt guns. Additionally, we've all seen or heard of what some of the less informed have done to fine guns to make them "shootable". Someone on this very board found a high grade Lindner that had been chopped down for cowboy action shooting. Go figure. With your Dickson, rest assured that the quality is there. If you bought it right then you can put a little money into it to make it right and still be ahead of the game.

The first guy to bounce this off of would be Michael Petrov. He's on the board. He can at least set you on the path.

Best

Nick