The fundamentals of marksmanship do not change. Doesn't matter if your artificial support is your loop sling and radius/ulna, or a Harris bipod, or a tripod, or a fallen tree, or a big rock.
With optics, sight alignment falls out of the list. But sight picture, support, natural point of aim, breathing control, trigger control, follow through, all still apply equally.
And 4 moa marksmanship "skill", will not get you very far on a prairie dog town, or many other situations.
