i think my best shooting aid is the 1" - 1 1/4" nylon sling. it steadies me up very good, and i feel confident to a reasonable range. possibly up to 150 yards, but that will have to be determined at each individual shot.
the "super sling" by outdoor connection is the one i use, as it will shorten up adequately, and is easily adjustable. got it at wal-mart. :roll:
i attach it to the walnut grip, by using the wood screw type sling stud. i attach at the contender forearm by replacing the front forearm screw with a machine thread type stud. on the encore, i install into the wood forend, out on the angled tip at the end of the forearm.
let the loop of the correctly adjusted sling, go behind the left elbow, while holding the forearm with the left hand. apply outward pressure with the left arm, and slight opposing pressure with the grip hand. works great for me :grin:
you could also try adding a third leg to your shooting stix. that would help considerably, i'd think.
all depends on the range, and what game you are after. varmints and longer ranges should give you more time to set up. the sling works good in eastern woods deer hunting, imo.