One of the things to remember is that the distance from the base of the sight to the position of the red dot itself can vary dramatically from one brand of sight to another. The Burris FF4 for instance has a dot that is 8 mm lower than the Leica Tempus, the Leica being designed for mounting on the receiver or bridge of a modern bolt action rifle with no iron sights and a flat comb. On a rifle with drop in the comb designed for open sight use having a Leica is a distinct disadvantage compared to the Burris FF4. If your rifle has drop in the comb you need to get the red dot down as low as possible and as close to the line of the open sights. This is especially important the more powerful and greater the recoil, otherwise if you have to start lifting your head of the stock to see through the red dot then you will start getting smacked in the face. It also will not be as quick to get on target.
On my 9.3 double I machined a pocket in the rib and made a custom base that fits in the pocket to allow a Burris FF4 to be mounted 0.1 mm above the rib, so it's as low as is possible and the dot is on the same plane as the open sight line and it works perfectly. You don't need to lift your head one bit and the dot is straight on target, very comfortable to shoot.
Matt.
-------------------- There is nothing wrong with vegetarian food, so long as there is meat with it.
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Re: Red Dot Sights for Big Bore Rifles
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