I try to make most shots at game, while sitting using a sling, with a 13"/27" harris bi-pod
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I constantly practice shooting both sitting and standing, for many, shots are taken, sitting using a sling, no bi-pod, but several were taken ,standing shooting offhand while using a sling.
I can generally hit most shots more than 70%-80% in a coke can size target,shooting offhand, with a sling out to about 100 yards,( hitting a 3.5"-4" circle)but cut that group size in 1/2 sitting with a sling, and a bit better still with a sling and bi-pod.
most of the game I've shot has been dropped at under 250 yards and mostly in thicker timber or narrow canyons, where ranges are generally not excessive