Not sure where you are hitting relative to the bead, but most hunters sight in such that the impact is at the top of the bead. This is because the bead can cover up too much of an animal or other unspecific field target (as opposed to a big, fat, NRA target meant to be aimed at.) Many serious iron sight users opt for a flat topped post, but this would not be "correct" for your Model 70, and you may want to keep it correct. Some other serious iron sight users opt for a small globe front like the Lyman 17A. You would be surprised what can be done with an aperture rear, a globe front, and the right insert. It is a paradigm shift using a front sight you can look "through" rather than "at." But again, not "correct" if you care about that.
Just my opinion, but I think a nice Model 70 like your with a Monte Carlo deserves a scope about like the one that came on yours.
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