In reply to:

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Hubert

I have two scoped Doubles. A 9.3 x74 Francotte and a 400 3 1/4 Alex Henry. The Francotte was built with a scope and shoots both open and the scope to point of aim with the same load and no difference in the grouping.

The AH had the scope added with claw mounts sometime after it was made and will not shoot the same load from both. I have two different loads for it depending on what I am doing. I will say the scope stays on 90% of the time.

If your rifle acts like the AH you will need to start at the beginning to develop a load and always shoot through the scope.

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Mickey Sometimes the cure for your problem with the AH is a lighter scope. This is the reason I dont like most European scopes, especially those with rail mounts. They are generally to heavy, and tend to throw off the regulation of the rifle when mounted.

There are two things one needs to be careful of, when mounting a scope on a double rifle that was not regulated for a scope by the maker. They are #1 the actual weight of the scope, and #2 the hight, and weight of the scope mount.

The over all weight of the scope & mounts will, most times, change the way the rife recoils considerably, as more weight is added. Addtionally, the hight of the mount creates more torque, the higher it gets above the CG of the rifle, changeing the recoil arch. The scope should be mounted as low as possible, and should be as light as is posible, and still be a quality scope, and repeteable QD mount!