Diana Diana 52 scope elevation adjustment

I may already know the answer, but figured I'd check with the experts to make sure before I start tinkering. I installed a new scope and one piece mount on my Diana 52. I adjusted the scope at 25 yards using Crosman 7.9g pellets. When I switched to using barracuda match 10.65g pellets it shot very low. I adjusted the elevation and there is no more up adjustment left on this scope. It is ok at 25 yards, but it would need to go up more at any greater distance. Previously I had a fixed 4x32 scope on with the same mount and had no problem getting the elevation correct with 9g pellets. I my question is it the scope, the mount, the gun or is 10.65g too heavy for a Diana 52? I don't think it's the spring as the gun is shooting 7.9g at about 975 - 1000 fps.
 
I may already know the answer, but figured I'd check with the experts to make sure before I start tinkering. I installed a new scope and one piece mount on my Diana 52. I adjusted the scope at 25 yards using Crosman 7.9g pellets. When I switched to using barracuda match 10.65g pellets it shot very low. I adjusted the elevation and there is no more up adjustment left on this scope. It is ok at 25 yards, but it would need to go up more at any greater distance. Previously I had a fixed 4x32 scope on with the same mount and had no problem getting the elevation correct with 9g pellets. I my question is it the scope, the mount, the gun or is 10.65g too heavy for a Diana 52? I don't think it's the spring as the gun is shooting 7.9g at about 975 - 1000 fps.

Some people like to shim their scopes.

I'm not one of them. Especially not on a magnum recoiling springer. Shimming just puts more stress on your scope tube and other scope components.

A better solution is to get a riser with a droop built in or a scope mount with droop built in.



The increased POI drop (at greater distances) you are seeing is due to you use of the heavier pellets. Gravity pulling the heavier pellet down faster and air resistance is also bleeding off speed.
 
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they used to sell one piece mounts RWS specifically for the magnum springer and you put the scope adjustment back to zero so you have plenty of adjustment and then make the large adjustment with the one piece mount.. it's what I had on my RWS Diana 48 in 22 caliber
mark
 
Optically center your scope then add a shim under the rear ring so it points the scope downward. shim can be made from a playing card or a piece of aluminum can. Don't over tighten ring caps. could also be your scope mount or stop pin alignment.
You never want to adjust a scope windage or elevation settings to its extreme end. The erector lense must have pressure on
it in order for the scope to hold it's POA. Going to far in any adjustment direction causes the erector lense to lose that stabilizing tension.
Thus, inconsistencies in accuracy will be the result.
I may already know the answer, but figured I'd check with the experts to make sure before I start tinkering. I installed a new scope and one piece mount on my Diana 52. I adjusted the scope at 25 yards using Crosman 7.9g pellets. When I switched to using barracuda match 10.65g pellets it shot very low. I adjusted the elevation and there is no more up adjustment left on this scope. It is ok at 25 yards, but it would need to go up more at any greater distance. Previously I had a fixed 4x32 scope on with the same mount and had no problem getting the elevation correct with 9g pellets. I my question is it the scope, the mount, the gun or is 10.65g too heavy for a Diana 52? I don't think it's the spring as the gun is shooting 7.9g at about 975 - 1000 fps.
You never want to adjust a scope windage or elevation settings to its extreme end. The erector lense must have pressure on
it in order for the scope to hold it's POA. Going to far in any adjustment direction causes the erector lense to lose that stabilizing tension.
Thus, inconsistencies in accuracy will be the result.