Asi RangeMaster help Needed

[oilyreid]

Hi i have just joined the bbs and got back into shooting. I have an old asi rangemaster i have been trying to fit a scope to. the scope is a hawke 32 by 4x fixed on dove tail mounts.
The dove tails on the rifle are shallow and the sight wont grip and keeps falling off.
i would appreciate any ideas i have cleaned out the grooves and filed the mounts to remove burrs ect i still cant get it too stay on.
The rifle is missing its rear sight which is a shame as otherwise it is complete and works well.
I think the apache rear sight is the same but until i speak to chambers i am not sure.
I am also rebuilding a Relum Tornado ( Please dont Laugh) i am using it to show my Son how an air riflle works and what makes it better or worse to shoot.
Many thanks
Oilyreid