Look on line at a field target match, or better yet attend a shoot. You will see a bunch of shooting sticks and many different kinds. They are easy to make from a couple 4 ft. wooden rods square or round about 3/4 in diameter, a 3/16" bolt and nut and a couple washers. Drill a 3/16" hole about 10 " from one end of the rods, insert bolt through one rod, place a couple washers, then go through other rod. Put nut and washer on bolt to hold it together. You can adjust height of sticks by spreading them a little or a lot. Sitting on a bucket and shooting from sticks is very accurate shooting in seasoned hands.
Bob in WV