two legs...hands down... you can always close them up to become a one legged monopod.
there's no use in pulling the trigger if your not STEADY. The two legs will steady the front end...then you have to worry about your shooting arm swaying. It doesn't take much sway to miss a coyote's chest at 300 yds. Becoming a rock should be your number one goal. Do whatever it takes to be solid... solid... solid.
Psalms 37:4 ... Delight yourself in the Lord, and He will give you the Desires of your Heart.