So basically, paper is not orthochromatic (blue sensitive only) it's just not red-sensitive. Or graded paper is blue sensitive only and MG paper is blue and green.

As far as contrast is concerned, graded paper will shoot at its grade, no filters required, MG paper negs will allow me some contrast control if I use my printing filters in front of the taking lens.
If I don't put filters in front of the lens what will it shoot at? Like a 1.5 -2 ?