I can't think of a reason why you would want a scope that big unless you wanted to hunt at night. I would rather have better optics than a huge objective. Mounting it and getting a proper cheek weld would be a pain I would think.
Perhaps Bushnell shares your opinion,and that is why they don't make any riflescopes with 60mm lenses.In fact, after doing some searching,I found no evidence at all that bushnell ever made a riflescope with a 60mm lens.