When I was stationed in Kodiak it was very different from what I do now. Out there it was 95% prone over a backpack or using an alder limb for support. Here it's 90% using the edge of the shooting window or stand rail. I try my best to avoid an unsupported off-hand. I am not good at it and don't practice as much as I should . If I can use a tree or limb for support I will. A sling supported off hand is much better than a straight up off hand.
