Caylen Wojcik, director of precision rifle training for the Magpul Dynamics Precision Hunter Course, shows me how to establish a solid shooting position using my body and available tools—in this case a pair of trekking poles and the sling on my Weatherby Vanguard 2 bolt-action hunting rifle.
Wojcik, a former Marine sniper and instructor, teaches his students that if they hunt with a bipod, it must be sturdy enough to lean into without failing, and the feet should be sharp enough to dig into the ground or a shooting support without slipping.
A sling can be used in conjunction with your shooting arm to stabilize a position. It needs to be tight and up as high on the upper arm as possible. Also note how Wojcik has only one leg extended on the bipod when shooting from a slopped horizontal support.
Shooters are encouraged to keep a log book to record information. A portion of that Data On Previous Engagements, or DOPE, can then be worn on the wrist or affixed to the rifle to help remind the shooter how his particular combination of rifle, scope and ammunition perform.
Two adjustable walking poles with wrist loops can make a great shooting support to be used from the seated or prone positions. Combine these with a tight sling and you will be surprised at how stable it can be.