Scope level mounting

Soquare it to your rifle rings and some people say top of scope turret but what if that's canted? Use at least 2 levels. One across your half scope ring mounted to the gun as your guide and another on the scope rail itself. If you don't want to remove your scope then just use MUCH LOWER rings with a bubble level on it. Dovetail or Picatinny bubble levels just mount to factory rails but you need to shim them if they don't match your 2 CONSTANT bubble levels.