Because there is only a limited amount of movement available to the erector tube, some rifle and scope combinations need extra help to enable the scope to be zeroed. This can be done by using an adjustable scope mount, but if it is just a question of raising the back of the scope to create more elevation adjustment, a simple answer is to pack up the back of the scope.
When material is introduced to the circular clamping section or ring of a scope mount it has a tendency to indent the aluminium scope tube and reduce the resale value dramatically. Even relatively soft materials can cause problems but one method seems to overcome the problem. Start with a piece of aluminium kitchen foil cut to about 300 x 100 mm. Then fold one edge over approximately 5 mm and then another about 7 mm and keep on folding successively 2 mm larger zig-zag sections until the full length of 300 mm is used up. Each layer of foil is approximately 0.02 of a millimetre thick and this creates a platform where the edges are ultra thin and yet the centre of the foil is about 0.33 of a millimetre thick.
Trim a piece of the foil off to match the width of the mount and place it into the bottom of the mount. When a scope is placed on top of the foil, it holds the foil in place and at the same time, it lifts the scope tube without marking it severely. The 1 inch or 30 mm circular shape of a mount is maintained and if more packing is required to achieve a zero a second piece of 0.33 mm can be added on top of the first.
If the scope requires more packing than this to allow the turrets to come into play the scope and / or the barrel need to be checked over by a gunsmith. Dry kitchen foil grips a scope tube very securely without the clamping screws being tightened to extremes and it is not effected by humidity or temperature.