Just got in a new Tikka T3x in .300WSM. I am planning to put a 1" tube Vortex Crossfire II with a 50mm objective on it. What are the recommended scope rings that are bolt on, and will give safe clearance from the scope and barrel of the rifle? Some research has indicated some modification on some rings may be necessary. I want a truly bolt on that I can set right and forget. Thanks in advance!